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 A268636 #4 Feb 09 2016 12:21:32 %S A268636 96,1944,29772,412740,5419992,68710116,849572724,10310685036, %T A268636 123340687488,1458578214948,17087534233740,198629587902636, %U A268636 2293776106412328,26339884438238244,300996939426028068 %N A268636 Number of nX5 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two exactly once. %C A268636 Column 5 of A268639. %H A268636 R. H. Hardin, <a href="/A268636/b268636.txt">Table of n, a(n) for n = 1..210</a> %F A268636 Empirical: a(n) = 32*a(n-1) -386*a(n-2) +2264*a(n-3) -7265*a(n-4) +13512*a(n-5) -14960*a(n-6) +9872*a(n-7) -3776*a(n-8) +768*a(n-9) -64*a(n-10) %e A268636 Some solutions for n=3 %e A268636 ..1..2..2..2..1. .1..0..0..0..0. .0..1..2..2..2. .1..2..1..0..1 %e A268636 ..0..1..0..1..2. .2..1..0..1..0. .1..2..2..2..1. .2..2..2..2..2 %e A268636 ..1..0..1..2..1. .0..0..1..0..0. .1..2..2..2..2. .1..2..1..2..2 %Y A268636 Cf. A268639. %K A268636 nonn %O A268636 1,1 %A A268636 _R. H. Hardin_, Feb 09 2016