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 A205474 #7 Jul 22 2025 18:55:13 %S A205474 46709,2686876,162976758,10546235416,690109737187,45724154665434, %T A205474 3037575583505983,202436915929887731,13498762783933351903, %U A205474 900966011839550985373,60138771941362142753965,4015480503188389069062751 %N A205474 Number of (n+1)X8 0..2 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..2 introduced in row major order. %C A205474 Column 7 of A205475 %H A205474 R. H. Hardin, <a href="/A205474/b205474.txt">Table of n, a(n) for n = 1..92</a> %e A205474 Some solutions for n=4 %e A205474 ..0..0..0..0..1..0..2..1....0..1..2..0..2..0..2..2....0..0..1..0..1..1..0..0 %e A205474 ..1..0..2..0..1..0..2..1....0..1..2..2..2..0..2..1....2..0..0..0..0..1..1..0 %e A205474 ..0..0..2..0..0..0..2..1....0..1..2..0..2..2..2..2....0..0..1..0..1..1..0..0 %e A205474 ..0..2..2..2..2..0..2..2....0..1..2..2..2..1..2..1....1..1..1..1..1..0..0..2 %e A205474 ..2..2..0..2..0..0..0..2....0..1..1..1..2..1..1..1....2..1..0..0..0..0..2..2 %K A205474 nonn %O A205474 1,1 %A A205474 _R. H. Hardin_ Jan 27 2012