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 A297652 #4 Jan 02 2018 15:13:02 %S A297652 21,1845,45036,1580681,56630842,1906300826,65775301075,2265577299182, %T A297652 77814433907002,2676719924368494,92051980153163166, %U A297652 3165307212249071372,108852027486036181894,3743236634629271063055,128723199495612208662339 %N A297652 Number of nX6 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 3 neighboring 1s. %C A297652 Column 6 of A297654. %H A297652 R. H. Hardin, <a href="/A297652/b297652.txt">Table of n, a(n) for n = 1..210</a> %e A297652 Some solutions for n=3 %e A297652 ..1..1..0..0..0..0. .1..1..0..0..1..0. .1..1..1..0..1..0. .0..1..0..1..0..0 %e A297652 ..1..0..1..0..1..1. .1..1..0..1..1..0. .0..1..0..0..1..1. .1..0..1..0..0..0 %e A297652 ..0..1..1..1..0..1. .1..0..0..0..1..1. .0..0..1..0..0..1. .0..0..1..1..1..0 %Y A297652 Cf. A297654. %K A297652 nonn %O A297652 1,1 %A A297652 _R. H. Hardin_, Jan 02 2018