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 13 results. Next

A284215 Number of n X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

1, 6, 70, 6511, 2417194, 3945536189, 26772321109067, 749608559151363940, 85781667864838421304454, 39910247433142071128719168435, 75224282551539452957156354090109083
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Comments

Diagonal of A284222.

Examples

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

Links

Crossrefs

Cf. A284222.

A284216 Number of n X 2 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

2, 6, 19, 62, 212, 751, 2719, 10002, 37258, 140108, 530646, 2021127, 7733421, 29702087, 114438213, 442099674, 1711885120, 6642102554, 25817134600, 100506778916, 391827603432, 1529486575678, 5977159139018, 23382840951503, 91561688560429, 358847611430293, 1407524281467975
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Examples

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

Links

Crossrefs

Column 2 of A284222.

A284217 Number of n X 3 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

3, 13, 70, 467, 3224, 23218, 170155, 1264605, 9488108, 71718240, 545264052, 4165262662, 31943452900, 245786167555, 1896529843618, 14669730799547, 113713016901442, 883107039574428, 6869733556332042, 53519589494550372
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Comments

Column 3 of A284222.

Examples

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

Links

Crossrefs

Cf. A284222.

A284218 Number of n X 4 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

6, 44, 499, 6511, 91260, 1317770, 19371893, 288303232, 4330336770, 65507133232, 996599090507, 15232184395483, 233708530421124, 3597476814925298, 55530194727444557, 859222993580853779, 13322830756899018309
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Comments

Column 4 of A284222.

Examples

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

Links

Crossrefs

Cf. A284222.

A284219 Number of n X 5 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

10, 143, 3214, 85887, 2417194, 69938626, 2058141264, 61304713234, 1842647045686, 55774782577154, 1697707702343462, 51912416104327610, 1593418341131944098, 49066300496202571019, 1515066051729449019246, 46893719654238123775675
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Comments

Column 5 of A284222.

Examples

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

Links

Crossrefs

Cf. A284222.

A284220 Number of n X 6 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

19, 495, 22729, 1214427, 68272108, 3945536189, 232036495984, 13815034342734, 830095968128023, 50232637096543404, 3057032671368258137, 186904092471409961598, 11471093132331725037674, 706316591332466208589249
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Comments

Column 6 of A284222.

Examples

			Some solutions for n=3
..0..1..1..0..0..1. .0..0..1..0..1..0. .0..0..0..0..1..0. .0..0..0..0..0..1
..0..1..0..1..0..0. .0..0..1..1..1..1. .0..0..1..1..0..1. .0..0..0..1..0..1
..1..1..1..0..1..1. .0..1..1..0..0..0. .0..1..0..1..0..1. .0..0..0..1..0..1

Links

Crossrefs

Cf. A284222.

A284221 Number of n X 7 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

33, 1746, 163708, 17538010, 1970768869, 227677212684, 26772321109067, 3187484402643589, 383012404461341362, 46352294274050867321, 5641487492728040767503, 689803988820235909398592
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Comments

Column 7 of A284222.

Examples

			Some solutions for n=3
..0..1..0..1..1..0..1. .0..1..0..1..1..1..0. .0..1..1..1..0..1..0
..0..0..1..1..1..1..0. .1..0..0..0..0..1..1. .0..0..1..0..1..1..0
..0..0..0..1..0..0..1. .0..1..1..0..1..1..1. .1..1..1..0..0..0..0

Links

Crossrefs

Cf. A284222.

A284223 Number of 2 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

2, 6, 13, 44, 143, 495, 1746, 6399, 23776, 89321, 337909, 1285710, 4914573, 18861581, 72633154, 280492954, 1085801918, 4211904917, 16367963509, 63710308355, 248341387058, 969279971828, 3787525164193, 14815659532381, 58010290470976
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Comments

Row 2 of A284222.

Examples

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

Links

Crossrefs

Cf. A284222.

A284224 Number of 3 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

4, 19, 70, 499, 3214, 22729, 163708, 1209005, 9018250, 67956917, 515031078, 3926103884, 30049105764, 230871573750, 1779036977175, 13746097605518, 106448904000193, 826010061981163, 6420762665883318, 49989175241774203
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Comments

Row 3 of A284222.

Examples

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

Links

Crossrefs

Cf. A284222.

A284225 Number of 4 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Original entry on oeis.org

8, 62, 467, 6511, 85887, 1214427, 17538010, 258414316, 3854276528, 58011648676, 879122723506, 13394856893254, 204995150323546, 3148797878923546, 48517163038369066, 749553577633265717, 11606806249286351346
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2017

Keywords

Comments

Row 4 of A284222.

Examples

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

Links

Crossrefs

Cf. A284222.
Showing 1-10 of 13 results. Next

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