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 A208162 #7 Jul 22 2025 21:12:31 %S A208162 19,361,1799,9039,55576,297702,1493661,7719181,39409874,196757286, %T A208162 981006372,4882898447,24159299179,119208331512,587545141168, %U A208162 2890792469683,14204090068621,69742665957409,342219461884514 %N A208162 Number of nX6 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 0 vertically. %C A208162 Column 6 of A208164 %H A208162 R. H. Hardin, <a href="/A208162/b208162.txt">Table of n, a(n) for n = 1..210</a> %e A208162 Some solutions for n=4 %e A208162 ..1..1..0..0..1..1....1..1..1..1..1..1....1..1..1..0..0..1....0..1..1..1..1..1 %e A208162 ..0..0..1..0..0..1....1..0..0..1..0..0....1..0..0..1..0..0....0..0..1..1..1..1 %e A208162 ..0..1..1..0..0..1....0..0..1..1..0..0....0..1..1..1..0..0....0..1..1..1..1..1 %e A208162 ..0..1..1..0..0..1....0..0..1..1..0..0....1..1..1..1..0..0....0..1..1..1..1..1 %K A208162 nonn %O A208162 1,1 %A A208162 _R. H. Hardin_ Feb 24 2012