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 A295780 #4 Nov 27 2017 07:14:54 %S A295780 34,739,7479,127731,1905471,27085621,409525082,6037613762,89072774496, %T A295780 1321788634101,19544371605946,289230460757404,4281937924123280, %U A295780 63365816364621759,937874156712320997,13881506306783920348 %N A295780 Number of nX7 0..1 arrays with each 1 adjacent to 0 or 2 king-move neighboring 1s. %C A295780 Column 7 of A295781. %H A295780 R. H. Hardin, <a href="/A295780/b295780.txt">Table of n, a(n) for n = 1..210</a> %H A295780 R. H. Hardin, <a href="/A295780/a295780.txt">Empirical recurrence of order 91</a> %F A295780 Empirical recurrence of order 91 (see link above) %e A295780 Some solutions for n=4 %e A295780 ..0..0..0..1..0..1..0. .0..0..1..0..0..0..1. .1..0..0..0..1..0..0 %e A295780 ..0..1..0..0..0..0..0. .0..0..1..1..0..0..0. .0..0..1..0..1..1..0 %e A295780 ..1..1..0..0..0..0..1. .0..0..0..0..0..1..1. .0..0..0..0..0..0..0 %e A295780 ..0..0..0..0..1..0..0. .1..0..1..0..0..1..0. .0..0..0..0..0..0..1 %Y A295780 Cf. A295781. %K A295780 nonn %O A295780 1,1 %A A295780 _R. H. Hardin_, Nov 27 2017