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 A208076 #7 Jul 22 2025 21:09:25 %S A208076 26,676,7722,88209,1228095,17098225,223058440,2909955136,38883428584, %T A208076 519568497721,6878039830935,91051386147225,1209832312020990, %U A208076 16075474357340836,213279261525196790,2829654813636106225 %N A208076 Number of nX6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 0 vertically. %C A208076 Column 6 of A208078 %H A208076 R. H. Hardin, <a href="/A208076/b208076.txt">Table of n, a(n) for n = 1..210</a> %e A208076 Some solutions for n=4 %e A208076 ..0..1..0..1..0..1....1..1..0..1..0..0....1..0..1..0..1..1....1..1..1..1..0..1 %e A208076 ..1..0..1..1..0..0....1..0..1..0..1..0....0..1..1..1..1..0....0..1..0..1..1..0 %e A208076 ..1..1..1..1..1..1....1..1..1..0..1..1....0..1..1..1..1..0....0..1..0..1..1..0 %e A208076 ..1..1..0..1..1..1....0..1..1..1..0..1....1..1..1..1..1..1....1..1..1..1..1..1 %K A208076 nonn %O A208076 1,1 %A A208076 _R. H. Hardin_ Feb 23 2012