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 A232960 #7 Jul 23 2025 07:46:19 %S A232960 1024,50421,5840289,609853251,66226131273,7168373617095, %T A232960 777971521023633,84438762415260969,9167008080471861213, %U A232960 995247064980829474743,108055419728642864698437,11731821554897060580948021 %N A232960 Number of 6Xn 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero. %C A232960 Row 6 of A232955 %H A232960 R. H. Hardin, <a href="/A232960/b232960.txt">Table of n, a(n) for n = 1..210</a> %H A232960 R. H. Hardin, <a href="/A232960/a232960.txt">Empirical recurrence of order 86</a> %F A232960 Empirical recurrence of order 86 (see link above) %e A232960 Some solutions for n=2 %e A232960 ..0..0....0..1....0..2....0..1....0..0....0..2....0..0....0..2....0..1....0..2 %e A232960 ..0..2....1..0....3..2....0..2....0..0....2..2....2..2....3..1....0..2....2..0 %e A232960 ..3..2....2..3....3..2....0..0....0..1....2..3....3..3....1..1....0..2....0..0 %e A232960 ..3..2....1..0....2..2....0..0....1..0....1..0....1..1....0..1....0..1....0..1 %e A232960 ..0..1....1..1....2..0....1..0....2..0....0..1....1..1....0..1....1..0....0..2 %e A232960 ..3..1....3..3....0..2....1..1....2..0....0..2....0..1....0..0....1..1....0..2 %K A232960 nonn %O A232960 1,1 %A A232960 _R. H. Hardin_, Dec 02 2013