cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-10 of 11 results. Next

A275560 Number of n X 3 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

3, 36, 126, 504, 1872, 7200, 27360, 104256, 397440, 1513728, 5769216, 21980160, 83755008, 319131648, 1215995904, 4633362432, 17654611968, 67270017024, 256320995328, 976668327936, 3721430827008, 14179888005120, 54030086701056
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Examples

			Some solutions for n=4:
..0..1..2. .0..0..1. .0..1..2. .0..1..1. .0..0..1. .0..1..2. .0..1..2
..1..0..0. .0..1..2. .1..1..0. .2..2..0. .2..1..1. .0..0..1. .0..1..1
..2..2..1. .1..2..2. .2..2..0. .1..0..2. .2..1..0. .2..2..0. .2..0..1
..0..1..2. .1..0..0. .2..2..1. .0..1..2. .1..0..2. .1..2..0. .2..0..0
		

Crossrefs

Column 3 of A275565.

Formula

Empirical: a(n) = 2*a(n-1) + 8*a(n-2) - 16*a(n-4) for n>5.
Empirical g.f.: 3*x*(1 + 10*x + 10*x^2 - 12*x^3 - 32*x^4) / (1 - 2*x - 8*x^2 + 16*x^4). - Colin Barker, Feb 04 2019

A275561 Number of n X 4 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

6, 96, 294, 1176, 4056, 15000, 54150, 196566, 714150, 2589894, 9405024, 34129350, 123887616, 449661894, 1632114294, 5924052504, 21502190976, 78045783606, 283279234776, 1028207094936, 3732040069656, 13546029168150, 49167456532134
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Examples

			Some solutions for n=4:
..0..1..2..0. .0..0..1..2. .0..0..1..1. .0..1..2..0. .0..1..2..0
..0..2..1..1. .0..0..1..1. .0..0..1..2. .1..2..0..0. .1..1..0..2
..2..2..0..1. .2..2..0..0. .2..1..0..0. .2..2..0..1. .2..0..1..2
..2..0..0..2. .1..1..0..2. .1..2..0..1. .2..0..1..2. .0..0..1..1
		

Crossrefs

Column 4 of A275565.

Formula

Empirical: a(n) = 3*a(n-1) + 5*a(n-2) - 8*a(n-3) - 11*a(n-4) + 17*a(n-5) - 4*a(n-6) - 6*a(n-7) + 3*a(n-8) + 2*a(n-9) - a(n-10) for n>11.
Empirical g.f.: 6*x*(1 + 13*x - 4*x^2 - 23*x^3 - 18*x^4 + 43*x^5 - 16*x^6 - 13*x^7 + 10*x^8 + 5*x^9 - 3*x^10) / ((1 - 5*x + 6*x^2 - 4*x^3 + x^4)*(1 + 2*x - x^2 - 5*x^3 - x^4 + 2*x^5 + x^6)). - Colin Barker, Feb 04 2019

A275562 Number of nX5 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

12, 288, 672, 3192, 13104, 57600, 248520, 1075140, 4663710, 20186982, 87477240, 378971730, 1641701760, 7112729712, 30813640998, 133494984432, 578341554336, 2505543992028, 10854800690652, 47026263554508, 203732097403680
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Comments

Column 5 of A275565.

Examples

			Some solutions for n=4
..0..1..1..2..0. .0..0..1..2..0. .0..0..1..1..2. .0..1..2..0..1
..0..1..2..0..1. .0..1..1..0..2. .2..2..1..0..2. .1..2..0..1..2
..1..2..2..1..1. .2..2..0..0..1. .2..1..0..2..1. .2..0..1..1..2
..1..0..0..2..2. .1..2..0..1..1. .1..1..2..2..1. .2..0..1..2..0
		

Crossrefs

Cf. A275565.

Formula

Empirical: a(n) = a(n-1) +22*a(n-2) +8*a(n-3) -191*a(n-4) -156*a(n-5) +917*a(n-6) +837*a(n-7) -2936*a(n-8) -2248*a(n-9) +6832*a(n-10) +3015*a(n-11) -11514*a(n-12) -1236*a(n-13) +14699*a(n-14) -2370*a(n-15) -15138*a(n-16) +4822*a(n-17) +12804*a(n-18) -4364*a(n-19) -8775*a(n-20) +2339*a(n-21) +4703*a(n-22) -715*a(n-23) -1892*a(n-24) +91*a(n-25) +563*a(n-26) +8*a(n-27) -120*a(n-28) -3*a(n-29) +16*a(n-30) -a(n-32) for n>34

A275563 Number of nX6 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

24, 864, 1536, 8664, 42336, 221184, 1140576, 5880600, 30456054, 157347846, 813636150, 4208095734, 21755077350, 112508808576, 581748762966, 3008229730656, 15555575422296, 80436769367064, 415938351877254
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Comments

Column 6 of A275565.

Examples

			Some solutions for n=4
..0..1..1..2..0..0. .0..1..1..0..2..1. .0..0..1..2..2..0. .0..1..2..2..1..1
..0..0..1..1..2..0. .2..1..0..2..1..1. .2..0..1..1..2..2. .0..0..2..2..1..0
..2..2..0..1..2..2. .1..0..2..2..0..0. .2..2..0..0..1..1. .1..0..0..1..2..2
..2..2..0..0..1..2. .1..0..2..1..0..2. .1..2..2..0..0..1. .2..2..1..0..2..2
		

Crossrefs

Cf. A275565.

Formula

Empirical: a(n) = 4*a(n-1) +18*a(n-2) -43*a(n-3) -174*a(n-4) +312*a(n-5) +789*a(n-6) -1739*a(n-7) -1097*a(n-8) +5171*a(n-9) -1998*a(n-10) -9410*a(n-11) +11413*a(n-12) +12083*a(n-13) -26002*a(n-14) -10656*a(n-15) +37255*a(n-16) +8019*a(n-17) -36716*a(n-18) -8772*a(n-19) +28058*a(n-20) +9837*a(n-21) -18944*a(n-22) -7243*a(n-23) +11224*a(n-24) +2985*a(n-25) -5229*a(n-26) -484*a(n-27) +1725*a(n-28) -126*a(n-29) -363*a(n-30) +74*a(n-31) +45*a(n-32) -13*a(n-33) -3*a(n-34) +a(n-35) for n>37

A275564 Number of nX7 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

48, 2592, 3552, 23712, 138600, 867456, 5360184, 33275880, 206892990, 1286374716, 7998368250, 49754459556, 309431155980, 1924683955344, 11971565665080, 74462297454048, 463161757751784, 2880875453047152, 17919172630925406
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Comments

Column 7 of A275565.

Examples

			Some solutions for n=4
..0..1..1..2..2..1..1. .0..0..1..1..0..0..2. .0..1..2..0..0..2..1
..2..0..1..2..2..0..0. .0..0..2..2..0..0..2. .0..1..1..0..2..2..0
..2..0..0..1..1..2..0. .1..1..2..2..1..1..0. .2..2..0..1..1..0..2
..1..2..0..0..1..1..2. .1..1..0..0..2..2..1. .1..0..2..2..0..1..2
		

Crossrefs

Cf. A275565.

A275566 Number of 3 X n 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

3, 54, 126, 294, 672, 1536, 3552, 8214, 19092, 44376, 103200, 240000, 558000, 1297350, 3015990, 7011366, 16299318, 37891014, 88085676, 204773784, 476041212, 1106661366, 2572675992, 5980747104, 13903551072, 32321836896, 75139155000
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Examples

			Some solutions for n=4:
..0..0..1..1. .0..1..2..0. .0..1..2..0. .0..0..1..1. .0..1..2..0
..2..0..0..2. .1..2..2..0. .0..2..2..1. .0..2..2..0. .1..2..0..1
..1..1..2..2. .1..2..0..1. .1..2..0..1. .1..1..0..2. .2..0..1..1
		

Crossrefs

Row 3 of A275565.

Formula

Empirical: a(n) = 3*a(n-1) - 5*a(n-3) + a(n-4) + 7*a(n-5) - 5*a(n-6) + 2*a(n-8) - a(n-9) for n>10.
Empirical g.f.: 3*x*(1 + 15*x - 12*x^2 - 23*x^3 + 19*x^4 + 25*x^5 - 25*x^6 + 4*x^7 + 8*x^8 - 5*x^9) / ((1 - 3*x + 2*x^2 - x^3)*(1 - 2*x^2 + 3*x^4 - x^6)). - Colin Barker, Feb 04 2019

A275567 Number of 4Xn 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

6, 216, 504, 1176, 3192, 8664, 23712, 64896, 180960, 504600, 1418100, 3985350, 11202990, 31492086, 88441764, 248378136, 697381260, 1958065350, 5498516310, 15440588646, 43363859406, 121784495766, 342029032494, 960580887846
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Comments

Row 4 of A275565.

Examples

			Some solutions for n=4
..0..0..1..1. .0..1..2..2. .0..1..1..0. .0..1..2..0. .0..1..1..0
..0..0..2..2. .1..0..0..1. .2..1..0..0. .1..1..0..2. .2..1..0..0
..1..1..0..0. .1..2..0..0. .2..2..0..1. .2..0..1..1. .1..2..0..1
..2..2..0..1. .2..1..1..0. .1..0..2..1. .2..2..1..0. .1..2..2..1
		

Crossrefs

Cf. A275565.

Formula

Empirical: a(n) = 5*a(n-1) -35*a(n-3) +31*a(n-4) +131*a(n-5) -205*a(n-6) -254*a(n-7) +705*a(n-8) -6*a(n-9) -1218*a(n-10) +823*a(n-11) +1150*a(n-12) -1646*a(n-13) -439*a(n-14) +1789*a(n-15) -394*a(n-16) -1015*a(n-17) +499*a(n-18) +285*a(n-19) -205*a(n-20) -46*a(n-21) +51*a(n-22) -6*a(n-24) +a(n-25) for n>28

A275568 Number of 5Xn 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

12, 864, 1872, 4056, 13104, 42336, 138600, 453750, 1506450, 5001414, 16784592, 56328576, 190035408, 641121414, 2165870262, 7316857446, 24718829850, 83508603750, 282120696000, 953100441600, 3220293856320, 10880587258614
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Comments

Row 5 of A275565.

Examples

			Some solutions for n=4
..0..1..2..2. .0..1..2..2. .0..0..1..2. .0..1..1..2. .0..1..2..2
..1..1..0..0. .1..0..0..1. .2..1..1..2. .2..1..0..0. .1..1..0..2
..1..2..0..1. .2..2..1..1. .2..1..0..0. .1..2..0..0. .1..0..0..1
..2..0..1..2. .0..2..2..0. .1..2..0..0. .1..2..2..1. .2..2..1..0
..0..0..2..2. .0..1..2..2. .1..2..2..1. .0..0..2..2. .0..1..2..0
		

Crossrefs

Cf. A275565.

Formula

Empirical: a(n) = 7*a(n-1) +7*a(n-2) -153*a(n-3) +128*a(n-4) +1661*a(n-5) -2987*a(n-6) -11147*a(n-7) +31265*a(n-8) +44933*a(n-9) -209769*a(n-10) -65464*a(n-11) +988481*a(n-12) -428751*a(n-13) -3404950*a(n-14) +3691505*a(n-15) +8623905*a(n-16) -16041975*a(n-17) -15201775*a(n-18) +49315575*a(n-19) +13559611*a(n-20) -116797842*a(n-21) +18028343*a(n-22) +220372013*a(n-23) -106427533*a(n-24) -335355156*a(n-25) +260460612*a(n-26) +411365412*a(n-27) -446068765*a(n-28) -401412528*a(n-29) +590037487*a(n-30) +301637628*a(n-31) -624695552*a(n-32) -161284890*a(n-33) +539917211*a(n-34) +45168922*a(n-35) -388786164*a(n-36) +14654711*a(n-37) +240717215*a(n-38) -29174529*a(n-39) -133749307*a(n-40) +24747125*a(n-41) +68598600*a(n-42) -17271849*a(n-43) -31876238*a(n-44) +10697884*a(n-45) +12697117*a(n-46) -5593463*a(n-47) -4068750*a(n-48) +2346552*a(n-49) +972250*a(n-50) -764373*a(n-51) -148698*a(n-52) +187979*a(n-53) +5357*a(n-54) -33466*a(n-55) +3817*a(n-56) +3912*a(n-57) -1040*a(n-58) -228*a(n-59) +129*a(n-60) -6*a(n-61) -6*a(n-62) +a(n-63) for n>66

A275569 Number of 6Xn 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

24, 3456, 7200, 15000, 57600, 221184, 867456, 3402054, 13630806, 54613734, 221152134, 895530534, 3642889494, 14818750854, 60456102318, 246642942006, 1008264289032, 4121735121504, 16864876108080, 69005901096600
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Comments

Row 6 of A275565.

Examples

			Some solutions for n=4
..0..0..1..2. .0..1..1..0. .0..1..1..0. .0..1..1..0. .0..1..2..0
..0..1..2..2. .0..2..2..1. .0..2..1..1. .2..2..0..1. .1..1..0..2
..1..1..0..0. .1..0..0..1. .2..2..0..1. .1..0..2..1. .2..0..0..2
..2..2..1..0. .2..0..0..2. .1..0..2..2. .0..0..1..2. .2..0..1..1
..0..2..2..1. .2..1..1..0. .0..1..1..0. .2..1..0..0. .0..2..2..0
..0..0..2..2. .0..2..2..1. .2..1..1..0. .1..1..0..0. .1..1..0..2
		

Crossrefs

Cf. A275565.

A275570 Number of 7Xn 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

48, 13824, 27360, 54150, 248520, 1140576, 5360184, 25190406, 121255722, 583672614, 2856462882, 13979378166, 68872236498, 339313015494, 1674808590654, 8266655528214, 40869197474880, 202051639449600, 1000919771188800
Offset: 1

Views

Author

R. H. Hardin, Aug 01 2016

Keywords

Comments

Row 7 of A275565.

Examples

			Some solutions for n=4
..0..0..1..1. .0..1..2..0. .0..1..2..0. .0..1..1..2. .0..1..2..0
..0..2..2..1. .1..2..2..1. .0..2..2..0. .0..0..1..1. .1..1..0..2
..1..2..2..0. .1..0..0..2. .1..2..0..1. .2..2..0..0. .2..0..1..2
..1..1..0..0. .2..1..1..0. .2..0..0..2. .1..2..2..0. .0..0..1..1
..2..1..1..2. .0..2..2..1. .2..1..1..0. .1..1..2..2. .0..2..2..0
..0..0..2..2. .0..0..2..2. .0..2..1..0. .0..0..1..1. .1..1..2..2
..0..0..2..1. .1..1..0..0. .0..2..2..1. .2..2..1..1. .1..0..0..2
		

Crossrefs

Cf. A275565.
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