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 A285752 #6 Apr 05 2020 23:21:41 %S A285752 0,14,105,630,4850,31276,250592,1727836,13831303,99330350,789537708, %T A285752 5828000730,46064702150,346391183886,2727741658914,20778683750294, %U A285752 163289874109963,1255321900392396,9855914786067634,76271581305888386 %N A285752 Number of 3 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1. %C A285752 Row 3 of A285750. %H A285752 R. H. Hardin, <a href="/A285752/b285752.txt">Table of n, a(n) for n = 1..210</a> %e A285752 Some solutions for n=4 %e A285752 ..0..0..0..0. .0..0..0..0. .1..1..1..0. .0..0..1..1. .0..1..1..0 %e A285752 ..1..0..1..1. .0..0..1..1. .1..0..1..0. .0..0..1..1. .1..0..0..0 %e A285752 ..1..0..1..0. .1..1..1..0. .0..1..0..0. .0..1..1..0. .0..0..1..1 %Y A285752 Cf. A285750. %K A285752 nonn %O A285752 1,2 %A A285752 _R. H. Hardin_, Apr 25 2017