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 A188849 #7 Jan 20 2024 15:07:54 %S A188849 54,2916,54914,1020454,16000078,251306086,3821933610,58235424734, %T A188849 881525407714,13352533241696,201974537581672,3055674923030466, %U A188849 46215972575070661,699031443159995702,10572425629707714942 %N A188849 Number of n X 7 binary arrays without the pattern 0 0 1 vertically, antidiagonally or horizontally. %C A188849 Column 7 of A188851. %H A188849 R. H. Hardin, <a href="/A188849/b188849.txt">Table of n, a(n) for n = 1..200</a> %e A188849 Some solutions for 3 X 7 %e A188849 ..0..1..1..1..0..1..1....1..1..1..1..0..0..0....0..1..0..1..1..1..1 %e A188849 ..1..0..1..0..1..0..1....0..1..1..1..0..1..0....1..0..1..1..1..1..1 %e A188849 ..0..1..0..0..0..0..0....1..0..1..0..0..0..0....0..1..1..0..1..1..1 %Y A188849 Cf. A188851. %K A188849 nonn %O A188849 1,1 %A A188849 _R. H. Hardin_, Apr 12 2011