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

A276243 Number of n X 3 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

3, 24, 85, 347, 1404, 5671, 23000, 93204, 377421, 1529844, 6199862, 25119735, 101801648, 412550060, 1671737809, 6774642628, 27453734102, 111251981923, 450838255264, 1826978135284, 7403609436805, 30002352111444, 121581392056470
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Examples

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

Crossrefs

Column 3 of A276248.

Formula

Empirical: a(n) = 5*a(n-1) - 4*a(n-2) + 17*a(n-3) - 83*a(n-4) + 54*a(n-5) + 56*a(n-6) for n>9.
Empirical g.f.: x*(3 + 9*x - 23*x^2 - 33*x^3 - 150*x^4 + 424*x^5 - 47*x^6 - 113*x^7 + 28*x^8) / ((1 - 2*x)*(1 - 3*x - 2*x^2 - 21*x^3 + 41*x^4 + 28*x^5)). - Colin Barker, Feb 05 2019

A276244 Number of nX4 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

6, 72, 279, 1447, 7316, 36744, 188696, 966555, 4951790, 25428687, 130544436, 670268288, 3442454805, 17679508687, 90799294877, 466351655607, 2395200182414, 12301874919271, 63183522824553, 324515866624876, 1666740802461017
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Comments

Column 4 of A276248.

Examples

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

Crossrefs

Cf. A276248.

Formula

Empirical: a(n) = 6*a(n-1) -5*a(n-2) +52*a(n-3) -290*a(n-4) +186*a(n-5) -750*a(n-6) +4724*a(n-7) -3230*a(n-8) +4486*a(n-9) -32737*a(n-10) +27394*a(n-11) -16656*a(n-12) +107909*a(n-13) -100918*a(n-14) +41478*a(n-15) -188601*a(n-16) +184276*a(n-17) -63820*a(n-18) +185119*a(n-19) -179543*a(n-20) +55691*a(n-21) -102915*a(n-22) +95614*a(n-23) -26448*a(n-24) +31475*a(n-25) -27524*a(n-26) +6584*a(n-27) -4916*a(n-28) +4089*a(n-29) -840*a(n-30) +341*a(n-31) -278*a(n-32) +50*a(n-33) -7*a(n-34) +6*a(n-35) -a(n-36) for n>37

A276245 Number of nX5 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

12, 216, 900, 6372, 43662, 291113, 2003694, 13727745, 93489265, 640009243, 4379295051, 29922848497, 204644541144, 1399625354348, 9569139510819, 65434111682248, 447456959717215, 3059585696910093, 20921152908833326
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Comments

Column 5 of A276248.

Examples

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

Crossrefs

Cf. A276248.

Formula

Empirical: a(n) = 9*a(n-1) -15*a(n-2) +193*a(n-3) -1673*a(n-4) +2361*a(n-5) -13142*a(n-6) +119938*a(n-7) -153895*a(n-8) +427606*a(n-9) -4363581*a(n-10) +5536053*a(n-11) -7687709*a(n-12) +89955043*a(n-13) -118267531*a(n-14) +83663690*a(n-15) -1111701314*a(n-16) +1540668051*a(n-17) -578797811*a(n-18) +8437597818*a(n-19) -12402279754*a(n-20) +2556185764*a(n-21) -39106130132*a(n-22) +61573100446*a(n-23) -6751787454*a(n-24) +105856537916*a(n-25) -184309560828*a(n-26) +8639167892*a(n-27) -147643128228*a(n-28) +315356494588*a(n-29) -1551938012*a(n-30) +63541767808*a(n-31) -274843851584*a(n-32) -4525044880*a(n-33) +51262094912*a(n-34) +89401851200*a(n-35) +1588916224*a(n-36) -39509856000*a(n-37) +2071917568*a(n-38) +578055168*a(n-39) -118431744*a(n-40) -1064960*a(n-41) for n>45

A276246 Number of nX6 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

24, 648, 2837, 26325, 234431, 2069454, 18671229, 167951009, 1509288801, 13609728840, 122702955310, 1106289221616, 9981742768716, 90071571350633, 812807513045538, 7336233541686365, 66219228884217858, 597727899610563029
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Comments

Column 6 of A276248.

Examples

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

Crossrefs

Cf. A276248.

A276247 Number of nX7 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

48, 1944, 9148, 115682, 1423062, 17450554, 219977330, 2780927371, 35144231606, 446083313365, 5668147759489, 72021229704285, 915757509022000, 11646919947937198, 148122094309974829, 1883921138963266109
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Comments

Column 7 of A276248.

Examples

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

Crossrefs

Cf. A276248.

A276249 Number of 3 X n 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

5, 36, 85, 279, 900, 2837, 9148, 29570, 95102, 306540, 989092, 3188130, 10278456, 33146672, 106872610, 344585885, 1111106822, 3582609009, 11551580944, 37246820838, 120097695423, 387239261828, 1248605509417, 4025972358284
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Comments

Row 3 of A276248.

Examples

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

Crossrefs

Cf. A276248.

Formula

Empirical: a(n) = 2*a(n-1) +3*a(n-2) +8*a(n-3) -10*a(n-4) -21*a(n-5) +17*a(n-7) +12*a(n-8) -17*a(n-9) +2*a(n-10) +3*a(n-11) +3*a(n-12) -a(n-14) for n>15.

A276250 Number of 4Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

14, 144, 347, 1447, 6372, 26325, 115682, 509750, 2196820, 9590448, 41943114, 182345942, 794079132, 3464843904, 15086188944, 65723682133, 286477934932, 1248121989813, 5437932782722, 23696963843058, 103252809255037
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Comments

Row 4 of A276248.

Examples

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

Crossrefs

Cf. A276248.

Formula

Empirical: a(n) = 2*a(n-1) +16*a(n-2) -5*a(n-3) -96*a(n-4) -140*a(n-5) +637*a(n-6) +1845*a(n-7) -4795*a(n-8) -4911*a(n-9) +12349*a(n-10) -1040*a(n-11) -18997*a(n-12) +57322*a(n-13) +54548*a(n-14) -182018*a(n-15) -172148*a(n-16) +276602*a(n-17) +240887*a(n-18) -309700*a(n-19) -3428*a(n-20) +178083*a(n-21) -246987*a(n-22) -172205*a(n-23) +88525*a(n-24) +1238349*a(n-25) -316382*a(n-26) -1914836*a(n-27) +450326*a(n-28) +1900140*a(n-29) +67773*a(n-30) -2250174*a(n-31) -208550*a(n-32) +2206511*a(n-33) +362321*a(n-34) -1986445*a(n-35) -432077*a(n-36) +1246173*a(n-37) +592283*a(n-38) -611575*a(n-39) -456433*a(n-40) +225504*a(n-41) +147384*a(n-42) +9126*a(n-43) -62519*a(n-44) -16308*a(n-45) +12194*a(n-46) +3502*a(n-47) -600*a(n-48) -251*a(n-49) +286*a(n-50) +69*a(n-51) -134*a(n-52) -27*a(n-53) +19*a(n-54) +8*a(n-55) -a(n-56) -a(n-57) for n>60

A276251 Number of 5Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

41, 576, 1404, 7316, 43662, 234431, 1423062, 8496628, 48688320, 288603590, 1711519279, 9976564722, 58701625833, 346524625690, 2030788320548, 11939927515262, 70303418241786, 412977048554900, 2427488189698431
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Comments

Row 5 of A276248.

Examples

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

Crossrefs

Cf. A276248.

A276252 Number of 6Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

122, 2304, 5671, 36744, 291113, 2069454, 17450554, 141165944, 1075068633, 8722058423, 70283762776, 549061777779, 4393994452605, 35216257735083, 278169606460673, 2216529301439897, 17704473017525506, 140499576312114974
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Comments

Row 6 of A276248.

Examples

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

Crossrefs

Cf. A276248.

A276253 Number of 7Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

Original entry on oeis.org

365, 9216, 23000, 188696, 2003694, 18671229, 219977330, 2410124377, 24361263053, 272372552980, 2985497491633, 31231199543135, 341233988414188, 3723139799743418, 39589701942441676, 428949119346736027
Offset: 1

Views

Author

R. H. Hardin, Aug 25 2016

Keywords

Comments

Row 7 of A276248.

Examples

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

Crossrefs

Cf. A276248.
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