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 A222377 #5 Jul 23 2025 02:33:04 %S A222377 14,234,8111,342953,16985929,963154789,61522684225,4169901076870, %T A222377 296032656700259,21407365398250792 %N A222377 Number of nX6 0..3 arrays with no more than floor(nX6/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order. %C A222377 Column 6 of A222378 %e A222377 Some solutions for n=4 %e A222377 ..0..0..0..0..1..0....0..0..0..1..0..2....0..0..0..0..0..1....0..0..0..0..1..0 %e A222377 ..0..0..0..2..1..2....0..0..0..0..0..2....0..0..0..0..1..2....0..0..0..0..2..3 %e A222377 ..0..0..0..0..1..1....0..0..0..0..2..1....0..0..0..1..2..2....0..0..0..0..1..3 %e A222377 ..0..0..0..0..0..3....0..0..0..0..0..3....0..0..0..1..1..2....0..0..0..0..3..1 %K A222377 nonn %O A222377 1,1 %A A222377 _R. H. Hardin_ Feb 17 2013