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 A297658 #4 Jan 02 2018 15:18:13 %S A297658 1,454,9033,113252,2525244,56630842,1075678445,21111073411, %T A297658 431729675719,8661860619988,172481732429072,3459368740976069, %U A297658 69421866008508425,1390069610625497582,27843303573923481669,558020746500279361494 %N A297658 Number of 5Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 3 neighboring 1s. %C A297658 Row 5 of A297654. %H A297658 R. H. Hardin, <a href="/A297658/b297658.txt">Table of n, a(n) for n = 1..210</a> %e A297658 Some solutions for n=4 %e A297658 ..1..1..0..0. .1..1..1..0. .1..1..1..0. .0..0..1..1. .1..1..0..0 %e A297658 ..0..0..1..1. .0..0..1..0. .1..1..0..1. .0..1..1..1. .1..0..1..0 %e A297658 ..0..0..0..0. .0..1..0..0. .0..0..0..0. .1..0..0..0. .1..0..0..0 %e A297658 ..0..0..1..0. .0..1..1..1. .0..1..1..0. .1..1..0..0. .0..1..1..1 %e A297658 ..0..1..0..0. .1..0..0..0. .1..1..1..0. .0..0..1..0. .0..1..1..0 %Y A297658 Cf. A297654. %K A297658 nonn %O A297658 1,2 %A A297658 _R. H. Hardin_, Jan 02 2018