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 A269108 #6 May 25 2024 23:04:19 %S A269108 8748,8787660,6482020140,4227147007836,2579398703502996, %T A269108 1509593256271433868,858502190008810133292,478110059855042497842996, %U A269108 262048541877700400412558012,141832398849461215193264315676 %N A269108 Number of n X 7 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three no more than once. %C A269108 Column 7 of A269109. %H A269108 R. H. Hardin, <a href="/A269108/b269108.txt">Table of n, a(n) for n = 1..210</a> %H A269108 R. H. Hardin, <a href="/A269108/a269108.txt">Empirical recurrence of order 64</a> %F A269108 Empirical recurrence of order 64 (see link above). %e A269108 Some solutions for n=1 %e A269108 ..2..1..0..2..2..2..0. .0..1..1..2..3..1..3. .3..3..1..3..0..0..2 %Y A269108 Cf. A269109. %K A269108 nonn %O A269108 1,1 %A A269108 _R. H. Hardin_, Feb 19 2016