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

A302524 Number of nX4 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

2, 10, 42, 168, 902, 3256, 15852, 77904, 314276, 1506894, 7035934, 30537794, 143024948, 655833426, 2937151450, 13568476862, 61920768478, 280707441628, 1287994621032, 5873565899442, 26746065104754, 122342967545180
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Column 4 of A302528.

Examples

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

Crossrefs

Cf. A302528.

Formula

Empirical recurrence of order 72 (see link above)

A302529 Number of 3Xn 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 10, 28, 42, 100, 290, 730, 1700, 4246, 10758, 26632, 65846, 164130, 408716, 1015998, 2527374, 6288152, 15643694, 38924730, 96845564, 240934118, 599472054, 1491590968, 3711076182, 9233281458, 22973573260, 57160260398, 142218013758
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Row 3 of A302528.

Examples

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

Crossrefs

Cf. A302528.

Formula

Empirical: a(n) = 4*a(n-1) -4*a(n-2) +6*a(n-3) -10*a(n-4) -24*a(n-5) +37*a(n-6) -22*a(n-7) +72*a(n-8) +18*a(n-9) -108*a(n-10) +24*a(n-11) -24*a(n-12) +24*a(n-13) +8*a(n-14) -8*a(n-15) for n>17

A302523 Number of nX3 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

1, 7, 28, 115, 497, 2086, 9091, 40575, 172996, 760155, 3348129, 14520438, 63606819, 278902951, 1216232548, 5321761651, 23294489377, 101772095142, 445140686771, 1947282645119, 8512898474820, 37229821964539, 162827989419377
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Column 3 of A302528.

Examples

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

Crossrefs

Cf. A302528.

Formula

Empirical: a(n) = 2*a(n-1) +7*a(n-2) +34*a(n-3) -44*a(n-4) -182*a(n-5) -a(n-6) +54*a(n-7) +479*a(n-8) -772*a(n-9) +328*a(n-10) +2176*a(n-11) -1456*a(n-12) +1088*a(n-13) -4480*a(n-14) +5120*a(n-15) -2304*a(n-16) -5120*a(n-17) +4096*a(n-18)

A302525 Number of nX5 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

3, 27, 100, 539, 3683, 17546, 92603, 615351, 3268978, 18424095, 115923699, 662227998, 3859905731, 23738169083, 140046826890, 831779950595, 5066753588103, 30319152922838, 181816222213079, 1103244221147287
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Column 5 of A302528.

Examples

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

Crossrefs

Cf. A302528.

A302526 Number of nX6 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

5, 45, 290, 1977, 23909, 182773, 1551340, 18089458, 155010391, 1441103898, 14993036510, 137595549895, 1311553678481, 12995883033340, 122771875897789, 1178882157960810, 11465157388913564, 109566686589917765
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Column 6 of A302528.

Examples

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

Crossrefs

Cf. A302528.

A302527 Number of nX7 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

8, 98, 730, 5942, 128242, 1275348, 16130212, 303355178, 3654880956, 51530586242, 829503866128, 11159474949120, 160761590077504, 2423517947094100, 34130627941733812, 494058647385825910, 7263463498716354406
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Column 7 of A302528.

Examples

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

Crossrefs

Cf. A302528.

A302530 Number of 4Xn 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 23, 115, 168, 539, 1977, 5942, 16733, 49219, 159516, 493401, 1460747, 4425266, 13722727, 42140581, 127606254, 388561273, 1192422089, 3648989388, 11120119943, 33934405093, 103799531930, 317293759665, 968655453293, 2958170322080
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Row 4 of A302528.

Examples

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

Crossrefs

Cf. A302528.

Formula

Empirical recurrence of order 68 (see link above)

A302531 Number of 5Xn 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 61, 497, 902, 3683, 23909, 128242, 465323, 1918153, 10153650, 48825739, 206962001, 913773720, 4366054069, 20367538805, 90798363146, 409867362675, 1900191504221, 8749921654714, 39674026618581, 180520404483627
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Row 5 of A302528.

Examples

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

Crossrefs

Cf. A302528.

A302532 Number of 6Xn 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 162, 2086, 3256, 17546, 182773, 1275348, 5557469, 29725028, 219531538, 1417475683, 7594793077, 44320481404, 286609212983, 1773676415155, 10321010368540, 61768196817718, 382689525785694, 2335752911548794
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Row 6 of A302528.

Examples

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

Crossrefs

Cf. A302528.

A302533 Number of 7 X n 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 421, 9091, 15852, 92603, 1551340, 16130212, 82774516, 506265517, 5660323142, 51739325680, 335761691745, 2418466197168, 21927716125718, 184725699865822, 1350254421406010, 10284927374810243, 86141789798720948, 701278900747323768
Offset: 1

Views

Author

R. H. Hardin, Apr 09 2018

Keywords

Comments

Row 7 of A302528.

Examples

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

Crossrefs

Cf. A302528.
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