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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.

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%I A297756 #6 May 03 2020 15:37:00
%S A297756 1,2,52,1181,109228,59707529,108229776807,486950815286291,
%T A297756 7321785704464787533,424569942925543143564742
%N 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.
%C A297756 Diagonal of A297762.
%e A297756 Some solutions for n=5
%e A297756 ..1..1..1..1..0. .1..1..1..0..0. .0..0..1..1..0. .0..0..1..1..0
%e A297756 ..1..1..1..1..1. .0..1..1..0..0. .0..1..1..1..1. .0..1..0..1..1
%e A297756 ..0..0..0..0..1. .0..0..0..1..1. .1..1..0..0..0. .1..1..0..1..1
%e A297756 ..1..1..0..1..1. .0..1..1..1..0. .0..0..0..1..1. .0..0..1..1..1
%e A297756 ..0..1..1..1..1. .0..0..1..1..0. .0..0..1..1..1. .0..0..0..0..0
%Y A297756 Cf. A297762.
%K A297756 nonn
%O A297756 1,2
%A A297756 _R. H. Hardin_, Jan 05 2018

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