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.
%I A297659 #4 Jan 02 2018 15:18:53 %S A297659 1,1632,55706,1105531,46187510,1906300826,63350980838,2211348272559, %T A297659 81510059624659,2921136549256989,103683457156054557, %U A297659 3719547264451758684,133489746983350501721,4775013243230452400632,170915659747129027279021 %N A297659 Number of 6Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 3 neighboring 1s. %C A297659 Row 6 of A297654. %H A297659 R. H. Hardin, <a href="/A297659/b297659.txt">Table of n, a(n) for n = 1..210</a> %e A297659 Some solutions for n=3 %e A297659 ..0..1..1. .0..1..1. .0..1..1. .1..0..0. .0..1..1. .1..1..0. .0..0..0 %e A297659 ..0..0..0. .1..1..0. .0..0..1. .0..1..0. .0..0..1. .0..0..0. .1..1..1 %e A297659 ..0..0..1. .0..1..0. .1..1..1. .0..1..0. .0..0..1. .1..1..0. .1..1..0 %e A297659 ..0..1..0. .1..1..1. .0..0..0. .1..0..0. .0..1..0. .0..1..0. .0..0..0 %e A297659 ..1..0..1. .0..1..0. .0..0..1. .0..1..1. .1..1..0. .0..1..0. .1..1..0 %e A297659 ..0..1..1. .1..1..0. .0..1..1. .1..1..0. .0..1..0. .0..1..1. .1..1..0 %Y A297659 Cf. A297654. %K A297659 nonn %O A297659 1,2 %A A297659 _R. H. Hardin_, Jan 02 2018