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 A297680 #4 Jan 03 2018 09:27:39 %S A297680 44,597,12110,221420,4202440,78957968,1487819051,28013761161, %T A297680 527589764007,9935480401770,187107516285853,3523634803856570, %U A297680 66357694370878682,1249658843756374555,23533781410865979450 %N A297680 Number of nX6 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1s. %C A297680 Column 6 of A297682. %H A297680 R. H. Hardin, <a href="/A297680/b297680.txt">Table of n, a(n) for n = 1..210</a> %H A297680 R. H. Hardin, <a href="/A297680/a297680.txt">Empirical recurrence of order 57</a> %F A297680 Empirical recurrence of order 57 (see link above) %e A297680 Some solutions for n=3 %e A297680 ..1..0..1..0..1..0. .1..0..1..0..1..1. .0..1..0..1..0..0. .1..0..0..0..1..0 %e A297680 ..0..0..0..0..0..1. .1..0..0..0..0..0. .0..1..0..1..0..0. .0..1..0..1..0..0 %e A297680 ..1..0..0..0..0..0. .1..0..1..0..0..1. .0..1..1..1..0..1. .0..0..0..0..0..1 %Y A297680 Cf. A297682. %K A297680 nonn %O A297680 1,1 %A A297680 _R. H. Hardin_, Jan 03 2018