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.

A284159 Number of n X 2 0..1 arrays with the number of 1's horizontally or vertically 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, 4, 13, 42, 134, 467, 1689, 6210, 23178, 87336, 331172, 1262635, 4836199, 18592719, 71697865, 277195002, 1074041216, 4169581090, 16214541562, 63150645344, 246288102302, 961707595682, 3759467766802, 14711266580343, 57620439699189
Offset: 1

Views

Author

R. H. Hardin, Mar 21 2017

Keywords

Comments

Column 2 of A284165.

Examples

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

Links

Crossrefs

Cf. A284165.

A284160 Number of n X 3 0..1 arrays with the number of 1's horizontally or vertically 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, 62, 461, 2872, 21790, 154108, 1174235, 8682209, 66280564, 500956582, 3842195970, 29399659661, 226595079490, 1747037865422, 13523344571285, 104799855374221, 814166845363267, 6333123661559589, 49348005883512820
Offset: 1

Views

Author

R. H. Hardin, Mar 21 2017

Keywords

Comments

Column 3 of A284165.

Examples

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

Links

Crossrefs

Cf. A284165.

A284161 Number of n X 4 0..1 arrays with the number of 1's horizontally or vertically 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, 42, 461, 5888, 80072, 1142173, 16699997, 247899694, 3717494360, 56178550056, 854108948176, 13048507894281, 200142020916533, 3080098116131143, 47536024103910119, 735432363055523510, 11402172535387288712
Offset: 1

Views

Author

R. H. Hardin, Mar 21 2017

Keywords

Comments

Column 4 of A284165.

Examples

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

Links

Crossrefs

Cf. A284165.

A284162 Number of n X 5 0..1 arrays with the number of 1's horizontally or vertically 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, 134, 2872, 80072, 2179255, 63520018, 1852406216, 55270158210, 1656400271264, 50135651563711, 1524221988811958, 46590358960961268, 1429160917194970783, 43992270165786177866, 1357848185549167921892, 42014950110987162854896
Offset: 1

Views

Author

R. H. Hardin, Mar 21 2017

Keywords

Comments

Column 5 of A284165.

Examples

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

Links

Crossrefs

Cf. A284165.

A284163 Number of n X 6 0..1 arrays with the number of 1's horizontally or vertically 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, 467, 21790, 1142173, 63520018, 3648835932, 213897742464, 12712253739523, 762954434250117, 46132889929802552, 2805893251846100894, 171472537110465965686, 10520216685129431413147, 647576935194197811151494
Offset: 1

Views

Author

R. H. Hardin, Mar 21 2017

Keywords

Comments

Column 6 of A284165.

Examples

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

Links

Crossrefs

Cf. A284165.

A284164 Number of n X 7 0..1 arrays with the number of 1's horizontally or vertically 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, 1689, 154108, 16699997, 1852406216, 213897742464, 25064817057781, 2981736353245523, 357844048109256955, 43278292532056389680, 5263990195553603263431, 643350359729498071977340
Offset: 1

Views

Author

R. H. Hardin, Mar 21 2017

Keywords

Comments

Column 7 of A284165.

Examples

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

Links

Crossrefs

Cf. A284165.

A284158 Number of n X n 0..1 arrays with the number of 1's horizontally or vertically 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, 4, 62, 5888, 2179255, 3648835932, 25064817057781, 708804054303474038
Offset: 1

Views

Author

R. H. Hardin, Mar 21 2017

Keywords

Comments

Diagonal of A284165.

Examples

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

Crossrefs

Cf. A284165.
Showing 1-7 of 7 results.

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