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 A285153 #6 Apr 05 2020 23:13:57 %S A285153 0,2,14,58,210,788,2960,11168,42402,161856,619864,2381342,9174202, %T A285153 35432030,137146164,531899380,2066518438,8041414956,31335774120, %U A285153 122265661844,477610788400,1867692035114,7310704019360,28641893196882 %N A285153 Number of 2 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1. %C A285153 Row 2 of A285152. %H A285153 R. H. Hardin, <a href="/A285153/b285153.txt">Table of n, a(n) for n = 1..210</a> %e A285153 Some solutions for n=4 %e A285153 ..0..0..1..0. .1..1..0..1. .1..1..0..0. .0..0..0..1. .0..0..1..0 %e A285153 ..1..0..1..0. .0..0..0..0. .0..0..0..0. .1..0..0..1. .1..0..0..0 %Y A285153 Cf. A285152. %K A285153 nonn %O A285153 1,2 %A A285153 _R. H. Hardin_, Apr 12 2017