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

A303079 Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

1, 12, 32, 112, 416, 1512, 5472, 19904, 72396, 263136, 956480, 3477232, 12641136, 45954928, 167063792, 607344064, 2207938656, 8026742304, 29180448720, 106082737616, 385653691936, 1402007389776, 5096865080336, 18529170684512
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Column 3 of A303084.

Examples

			Some solutions for n=5
..0..0..1. .0..1..0. .0..1..0. .0..0..1. .0..0..0. .0..0..0. .0..0..0
..1..0..0. .1..1..1. .1..1..1. .0..0..1. .1..0..1. .1..0..1. .1..0..1
..0..0..0. .1..1..0. .0..1..0. .0..0..1. .0..0..1. .1..0..0. .0..0..1
..1..1..1. .1..1..0. .1..1..1. .1..0..0. .0..0..0. .0..0..0. .1..0..0
..1..1..1. .0..1..1. .1..1..0. .0..0..0. .0..0..1. .1..0..0. .0..0..1
		

Crossrefs

Cf. A303084.

Formula

Empirical: a(n) = 5*a(n-1) -7*a(n-2) +14*a(n-3) -24*a(n-4) +4*a(n-5) -12*a(n-6) -8*a(n-7) +12*a(n-8) -24*a(n-9) -4*a(n-10) -8*a(n-11)

A303080 Number of n X 4 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

1, 20, 29, 90, 304, 1054, 4182, 17369, 75377, 335199, 1511973, 6877743, 31436925, 144097153, 661586920, 3040460522, 13981091806, 64311876578, 295889956660, 1361516449806, 6265388048955, 28833190731421, 132693419071842
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Column 4 of A303084.

Examples

			Some solutions for n=5
..0..0..0..1. .0..0..1..0. .0..1..1..0. .0..1..1..1. .0..0..0..1
..0..0..0..1. .0..0..1..0. .1..1..1..0. .1..1..1..0. .0..0..0..1
..0..1..0..1. .1..1..1..1. .0..1..1..0. .0..0..1..0. .0..0..0..0
..0..0..0..1. .0..1..0..0. .0..1..1..0. .0..0..1..1. .1..1..1..1
..0..0..0..0. .0..1..0..0. .1..1..1..0. .0..0..1..1. .1..1..1..0
		

Crossrefs

Cf. A303084.

Formula

Empirical: a(n) = 8*a(n-1) -20*a(n-2) +40*a(n-3) -120*a(n-4) +154*a(n-5) -227*a(n-6) +511*a(n-7) +23*a(n-8) +913*a(n-9) -826*a(n-10) -2376*a(n-11) -4502*a(n-12) -920*a(n-13) +3818*a(n-14) +8855*a(n-15) -818*a(n-16) -403*a(n-17) +2092*a(n-18) +20390*a(n-19) +17737*a(n-20) +13494*a(n-21) +4257*a(n-22) +11150*a(n-23) +41175*a(n-24) +19200*a(n-25) -34770*a(n-26) -72210*a(n-27) -29661*a(n-28) +7521*a(n-29) +6424*a(n-30) -14914*a(n-31) -37578*a(n-32) -31048*a(n-33) +39954*a(n-34) +42548*a(n-35) -9756*a(n-36) -24760*a(n-37) -7244*a(n-38) +12262*a(n-39) +22816*a(n-40) +9539*a(n-41) -6968*a(n-42) -8366*a(n-43) +142*a(n-44) +5260*a(n-45) +1414*a(n-46) -1709*a(n-47) -1376*a(n-48) -1138*a(n-49) -624*a(n-50) +218*a(n-51) +300*a(n-52) +84*a(n-53) +36*a(n-54) +16*a(n-55) -16*a(n-56) for n>57.

A303081 Number of nX5 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

1, 72, 258, 1455, 11767, 84474, 615471, 4647197, 35089147, 266582788, 2040291566, 15688494163, 121138647551, 938798080313, 7297261476590, 56863460415074, 444030008288805, 3473279096665275, 27207246337447767, 213372255333189453
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Column 5 of A303084.

Examples

			Some solutions for n=5
..0..0..0..0..0. .0..0..0..1..1. .0..1..0..1..1. .0..0..0..0..0
..1..0..1..0..0. .0..0..1..1..1. .1..1..1..1..0. .0..0..0..0..1
..1..0..1..0..1. .1..0..0..0..1. .1..1..0..1..1. .0..0..0..0..1
..0..0..0..0..0. .0..0..0..1..1. .0..1..1..1..1. .0..0..0..0..0
..0..0..1..0..1. .1..0..0..1..1. .0..1..1..1..0. .1..0..1..0..1
		

Crossrefs

Cf. A303084.

A303082 Number of nX6 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

1, 168, 432, 3667, 34430, 409478, 4862916, 60442630, 764631608, 9669569563, 122749248476, 1560529225399, 19844842693550, 252421510589391, 3211301552676338, 40856246979685360, 519811697254457408
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Column 6 of A303084.

Examples

			Some solutions for n=5
..0..1..1..0..1..1. .0..1..1..1..1..0. .0..0..0..1..1..1. .0..0..0..0..0..1
..1..1..1..0..1..1. .1..1..0..1..1..1. .1..0..0..1..1..0. .0..0..0..0..0..0
..0..0..0..0..0..0. .1..1..0..1..1..0. .0..0..1..1..1..0. .1..1..1..1..1..0
..1..0..0..1..0..0. .0..0..1..0..1..0. .1..0..0..1..1..0. .1..1..1..1..0..0
..1..0..0..1..0..0. .1..0..0..1..1..1. .1..0..0..1..1..1. .1..1..1..1..0..0
		

Crossrefs

Cf. A303084.

A303083 Number of n X 7 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

1, 496, 2525, 33152, 636070, 13375327, 266882021, 5754725245, 125608726910, 2751441878716, 60560951633302, 1338653889825967, 29617783009064771, 655764759948936409, 14528234528855832400, 321957970196713225956
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Column 7 of A303084.

Examples

			Some solutions for n=5
..0..0..1..0..0..0..0. .0..0..1..1..0..0..1. .0..0..1..1..0..0..1
..0..0..0..0..0..0..1. .0..0..1..1..0..0..0. .0..0..0..1..1..0..0
..0..0..1..0..1..0..0. .0..0..0..1..1..0..1. .0..0..1..0..1..1..0
..1..0..1..0..0..0..1. .0..0..1..1..0..0..0. .0..0..1..1..0..0..0
..0..0..0..0..1..0..0. .1..0..0..0..0..0..1. .0..0..0..1..1..0..1
		

Crossrefs

Cf. A303084.

A303085 Number of 3Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

4, 2, 32, 29, 258, 432, 2525, 6313, 30188, 97855, 428478, 1605301, 6821375, 27390903, 115569231, 478335810, 2017576268, 8457463080, 35707225807, 150472100292, 635822248364, 2685274511197, 11352580693193, 47989709554314
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Row 3 of A303084.

Examples

			Some solutions for n=5
..0..0..1..1..1. .0..0..0..1..1. .0..1..1..1..0. .0..0..1..0..0
..1..0..0..1..1. .0..0..1..1..1. .0..1..1..1..0. .1..0..0..0..0
..0..0..1..1..0. .0..0..1..1..0. .1..1..1..1..0. .1..0..0..0..1
		

Crossrefs

Cf. A303084.

Formula

Empirical: a(n) = 7*a(n-1) -2*a(n-2) -67*a(n-3) +80*a(n-4) +187*a(n-5) -202*a(n-6) -298*a(n-7) +122*a(n-8) +213*a(n-9) +122*a(n-10) +126*a(n-11) -63*a(n-12) -416*a(n-13) +152*a(n-14) +20*a(n-15) -21*a(n-16) +9*a(n-17) for n>18

A303086 Number of 4Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

8, 3, 112, 90, 1455, 3667, 33152, 157838, 1161232, 7100035, 49678916, 329669849, 2281641594, 15540614996, 107301648292, 737154651791, 5087197252026, 35051028229325, 241871543186476, 1668193998276026, 11511498465288360
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Row 4 of A303084.

Examples

			Some solutions for n=5
..0..1..0..1..0. .0..1..0..1..1. .0..1..0..0..1. .0..1..1..1..1
..1..1..1..1..1. .1..1..1..1..0. .0..1..0..0..1. .1..1..1..1..1
..1..1..1..1..0. .0..1..0..1..1. .0..1..0..0..0. .0..1..0..1..0
..0..1..0..1..1. .1..1..1..1..0. .0..1..0..0..1. .1..1..1..1..1
		

Crossrefs

Cf. A303084.

Formula

Empirical recurrence of order 67 (see link above)

A303087 Number of 5Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

16, 6, 416, 304, 11767, 34430, 636070, 4585419, 60170515, 624887953, 7591519361, 87577958854, 1051143716702, 12466186847080, 149433683446612, 1785840844823381, 21408005102663193, 256419078046090099
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Row 5 of A303084.

Examples

			Some solutions for n=5
..0..1..0..0..1. .0..1..0..0..1. .0..1..1..1..0. .0..0..1..1..1
..0..1..0..0..1. .0..1..0..0..1. .1..1..1..1..0. .1..0..0..1..1
..1..1..1..0..1. .1..1..1..0..0. .0..1..0..1..0. .0..0..1..0..0
..0..1..1..0..0. .1..1..1..0..1. .1..1..0..1..1. .1..1..0..0..0
..1..1..0..0..0. .0..1..0..0..0. .1..1..1..1..1. .0..1..1..0..1
		

Crossrefs

Cf. A303084.

A303088 Number of 6Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

32, 10, 1512, 1054, 84474, 409478, 13375327, 170974652, 3893734675, 71289930593, 1496311061702, 30100235172688, 624208088551832, 12842477892658295, 266147935416358350, 5506837456678308359, 114163685076018803329
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Row 6 of A303084.

Examples

			Some solutions for n=5
..0..0..1..0..0. .0..1..1..0..0. .0..0..1..1..1. .0..0..0..0..1
..1..0..0..0..1. .1..1..0..0..1. .1..0..0..1..0. .1..0..0..0..0
..1..0..0..0..0. .0..1..1..0..1. .0..0..1..1..1. .0..0..1..0..0
..0..0..0..0..1. .1..1..0..0..0. .0..0..0..1..1. .0..0..0..0..1
..0..0..1..0..0. .0..1..1..0..1. .1..0..0..1..1. .1..0..1..0..0
..1..0..0..0..0. .1..1..1..0..1. .1..0..0..1..1. .1..0..1..0..0
		

Crossrefs

Cf. A303084.

A303089 Number of 7Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

64, 21, 5472, 4182, 615471, 4862916, 266882021, 5924274499, 231312682374, 7326136324116, 265724475520255, 9228359438652216, 330920558831885611, 11758758712910364555, 421228402696480451106, 15057312628686341086187
Offset: 1

Views

Author

R. H. Hardin, Apr 18 2018

Keywords

Comments

Row 7 of A303084.

Examples

			Some solutions for n=5
..0..0..0..0..1. .0..0..0..0..0. .0..0..0..1..1. .0..0..0..0..1
..0..0..1..0..0. .1..0..0..0..0. .0..0..1..1..1. .0..0..0..0..1
..0..0..1..0..0. .1..0..1..0..1. .1..0..0..1..0. .1..0..1..0..0
..1..1..0..1..1. .0..0..0..0..0. .0..0..0..1..1. .0..0..0..0..0
..1..1..0..1..1. .0..0..0..0..0. .0..1..1..1..0. .1..1..0..1..1
..1..1..1..1..1. .1..1..1..1..1. .0..0..1..1..1. .0..1..1..1..0
..1..1..0..1..0. .0..1..1..1..1. .0..0..0..1..1. .0..1..1..1..0
		

Crossrefs

Cf. A303084.
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