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 A232300 #6 Jul 23 2025 07:16:43 %S A232300 1,8401,3249889,877968487,267483142619,84130295708483, %T A232300 26187902385019287,8136241891839631865,2529645200623557298353, %U A232300 786580592473211934495715,244572157423387608710030975,76044579489609299365492556559 %N A232300 Number of 6Xn 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally. %C A232300 Row 6 of A232295 %H A232300 R. H. Hardin, <a href="/A232300/b232300.txt">Table of n, a(n) for n = 1..210</a> %e A232300 Some solutions for n=2 %e A232300 ..2..2....2..2....1..2....1..2....1..2....1..2....2..2....2..1....2..2....2..1 %e A232300 ..2..2....2..2....1..1....1..0....1..0....1..0....1..0....2..1....2..1....2..1 %e A232300 ..2..1....1..0....2..2....0..1....2..2....2..2....2..1....2..1....1..2....2..1 %e A232300 ..2..1....0..1....1..2....2..1....1..2....2..2....0..2....0..2....1..0....0..2 %e A232300 ..0..2....2..2....2..0....2..1....1..1....0..1....0..1....2..1....2..2....1..0 %e A232300 ..1..2....1..2....1..2....2..1....2..1....2..2....2..1....2..1....1..2....1..2 %K A232300 nonn %O A232300 1,2 %A A232300 _R. H. Hardin_, Nov 22 2013