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 1-7 of 7 results.

A289645 Number of n X 2 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

Original entry on oeis.org

0, 2, 11, 44, 170, 642, 2421, 9142, 34572, 131086, 498465, 1900928, 7269978, 27879108, 107183763, 413052074, 1595247760, 6173412924, 23934713193, 92955294982, 361580812792, 1408539219596, 5494347736318, 21458645441596
Offset: 1

Views

Author

R. H. Hardin, Jul 09 2017

Keywords

Comments

Column 2 of A289651.

Examples

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

Links

Crossrefs

Cf. A289651.

A289646 Number of n X 3 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

Original entry on oeis.org

0, 11, 61, 607, 3160, 31271, 183390, 1714758, 10957160, 97430209, 660963859, 5659723958, 40059954256, 334030499016, 2436982696260, 19950172380212, 148739597215073, 1202453728957318, 9105730676248720, 72992556634640541
Offset: 1

Views

Author

R. H. Hardin, Jul 09 2017

Keywords

Comments

Column 3 of A289651.

Examples

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

Links

Crossrefs

Cf. A289651.

A289647 Number of n X 4 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

Original entry on oeis.org

0, 44, 607, 8554, 121162, 1756800, 25760875, 382162921, 5717697619, 86172849366, 1306560879457, 19912006342895, 304785181627320, 4682731916448540, 72178508386597722, 1115665066715856620, 17287052005230219381
Offset: 1

Views

Author

R. H. Hardin, Jul 09 2017

Keywords

Comments

Column 4 of A289651.

Examples

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

Links

Crossrefs

Cf. A289651.

A289648 Number of n X 5 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

Original entry on oeis.org

0, 170, 3160, 121162, 2662095, 98170524, 2439241607, 85298181531, 2290353406298, 77037980321836, 2176569413456699, 71346369797861453, 2085490311029971908, 67240283396530142367, 2011139437400224916141, 64177327039938639669846
Offset: 1

Views

Author

R. H. Hardin, Jul 09 2017

Keywords

Comments

Column 5 of A289651.

Examples

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

Links

Crossrefs

Cf. A289651.

A289649 Number of n X 6 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

Original entry on oeis.org

1, 642, 31271, 1756800, 98170524, 5675111511, 332113863074, 19700973655406, 1179502836506537, 71173612294297941, 4321709778773574262, 263787324115374465023, 16170909984602074224282, 994955226590688056771461
Offset: 1

Views

Author

R. H. Hardin, Jul 09 2017

Keywords

Comments

Column 6 of A289651.

Examples

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

Links

Crossrefs

Cf. A289651.

A289650 Number of n X 7 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

Original entry on oeis.org

3, 2421, 183390, 25760875, 2439241607, 332113863074, 35072966294346, 4615203834449304, 519140871714574338, 66784349259505575111, 7809000921229551589905, 991318340748862385457430
Offset: 1

Views

Author

R. H. Hardin, Jul 09 2017

Keywords

Comments

Column 7 of A289651.

Examples

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

Links

Crossrefs

Cf. A289651.

A289644 Number of n X n 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

Original entry on oeis.org

0, 2, 61, 8554, 2662095, 5675111511, 35072966294346, 1096128160677176696, 121691314711314375091217
Offset: 1

Views

Author

R. H. Hardin, Jul 09 2017

Keywords

Comments

Diagonal of A289651.

Examples

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

Crossrefs

Cf. A289651.
Showing 1-7 of 7 results.

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