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 A293097 #6 Apr 05 2020 23:46:57 %S A293097 0,150,3619,114318,3125547,96199260,2804027631,85892871786, %T A293097 2579471093496,79165386206572,2414473870996735,74393395305521924, %U A293097 2289463201811310969,70829848364578443940,2192557122492637558076,68078551369044294704640 %N A293097 Number of n X 5 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1. %C A293097 Column 5 of A293100. %H A293097 R. H. Hardin, <a href="/A293097/b293097.txt">Table of n, a(n) for n = 1..89</a> %e A293097 Some solutions for n=4 %e A293097 ..0..1..1..0..0. .1..0..0..0..1. .0..1..0..0..0. .0..1..0..0..1 %e A293097 ..0..0..0..0..1. .0..0..1..1..1. .1..0..0..0..0. .0..1..0..1..1 %e A293097 ..0..0..0..0..1. .0..1..0..0..1. .1..1..0..1..0. .0..1..1..1..0 %e A293097 ..1..0..1..1..1. .1..0..0..0..1. .0..1..0..1..1. .0..0..0..0..1 %Y A293097 Cf. A293100. %K A293097 nonn %O A293097 1,2 %A A293097 _R. H. Hardin_, Sep 30 2017