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 A269205 #6 Mar 09 2023 17:23:16 %S A269205 1024,132300,8314020,555862380,34838403756,2135938293684, %T A269205 128136007344516,7568312936979972,441444334269067260, %U A269205 25489789190515708236,1459585457554075237908,82994548126187965994148 %N A269205 Number of 5 X n 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once. %C A269205 Row 5 of A269201. %H A269205 R. H. Hardin, <a href="/A269205/b269205.txt">Table of n, a(n) for n = 1..210</a> %H A269205 R. H. Hardin, <a href="/A269205/a269205.txt">Empirical recurrence of order 52</a> %F A269205 Empirical recurrence of order 52 (see link above). %e A269205 Some solutions for n=2 %e A269205 ..1..3. .1..0. .1..3. .1..0. .2..2. .1..3. .1..0. .0..2. .1..0. .2..2 %e A269205 ..1..3. .3..3. .3..1. .0..2. .3..2. .1..1. .2..0. .0..2. .1..0. .0..0 %e A269205 ..2..0. .3..3. .0..3. .2..0. .2..3. .0..1. .2..0. .2..1. .1..3. .1..3 %e A269205 ..1..0. .3..2. .1..0. .2..3. .2..3. .0..0. .0..3. .3..3. .1..3. .1..3 %e A269205 ..0..2. .0..2. .0..0. .2..0. .3..1. .2..0. .1..0. .3..1. .3..1. .2..0 %Y A269205 Cf. A269201. %K A269205 nonn %O A269205 1,1 %A A269205 _R. H. Hardin_, Feb 20 2016