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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.

A297756 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1's.

Original entry on oeis.org

1, 2, 52, 1181, 109228, 59707529, 108229776807, 486950815286291, 7321785704464787533, 424569942925543143564742
Offset: 1

Views

Author

R. H. Hardin, Jan 05 2018

Keywords

Comments

Diagonal of A297762.

Examples

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

Crossrefs

Cf. A297762.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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