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 A189902 #7 Jun 18 2022 15:53:37 %S A189902 52,2704,140608,3833322,109264923,2719427244,63149685928, %T A189902 1435483321366,31396505039678,678724157124848,14470229604883676, %U A189902 305997066532246950,6438705507919059232,134891856265337289564,2819613055895413412294 %N A189902 Number of n X 6 binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally. %C A189902 Column 6 of A189905. %H A189902 R. H. Hardin, <a href="/A189902/b189902.txt">Table of n, a(n) for n = 1..200</a> %e A189902 Some solutions for 4 X 6 %e A189902 ..0..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..0..1....0..0..0..0..0..0 %e A189902 ..0..1..0..1..0..0....1..1..1..1..0..1....1..0..1..1..1..1....1..0..1..0..0..0 %e A189902 ..0..1..0..0..1..0....0..0..0..1..0..1....0..1..0..0..1..0....0..0..1..0..0..0 %e A189902 ..0..0..0..0..0..0....0..1..1..1..0..0....0..0..1..0..0..0....1..0..1..0..1..1 %Y A189902 Cf. A189905. %K A189902 nonn %O A189902 1,1 %A A189902 _R. H. Hardin_, May 01 2011