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 A208367 #7 Jul 22 2025 21:17:57 %S A208367 26,676,6186,52821,507682,4503765,38542393,334331082,2885233676, %T A208367 24682262700,211197852495,1807060419576,15434332682027, %U A208367 131756292799275,1124739131632930,9598207952367000,81889697535538942,698632543565035989 %N A208367 Number of nX6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 0 1 0 vertically. %C A208367 Column 6 of A208369 %H A208367 R. H. Hardin, <a href="/A208367/b208367.txt">Table of n, a(n) for n = 1..210</a> %e A208367 Some solutions for n=4 %e A208367 ..0..1..1..0..1..0....1..1..0..1..0..0....0..1..1..1..1..1....1..1..1..0..1..0 %e A208367 ..0..1..0..1..0..0....0..1..0..1..0..0....0..1..0..1..1..0....0..1..0..1..1..1 %e A208367 ..0..1..1..1..1..0....0..1..0..1..0..0....0..1..0..1..1..0....0..1..1..1..0..1 %e A208367 ..0..1..1..1..1..0....0..1..0..1..0..0....0..1..0..1..1..0....0..1..1..0..1..1 %K A208367 nonn %O A208367 1,1 %A A208367 _R. H. Hardin_ Feb 25 2012