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 A202374 #7 Jul 22 2025 16:33:22 %S A202374 1326,5677,20247,62033,182411,494783,1285065,3207444,7727120,18118987, %T A202374 41455583,92866560,204327155,442336864,944080705,1989776449, %U A202374 4146042739,8551843243,17477022964,35418893825,71235013646,142269636195 %N A202374 Number of (n+2)X6 binary arrays avoiding patterns 001 and 111 in rows and columns. %C A202374 Column 4 of A202378 %H A202374 R. H. Hardin, <a href="/A202374/b202374.txt">Table of n, a(n) for n = 1..210</a> %e A202374 Some solutions for n=4 %e A202374 ..0..1..0..1..0..0....0..1..0..0..0..0....0..1..1..0..1..1....1..1..0..1..0..0 %e A202374 ..1..0..1..0..1..1....1..0..1..1..0..1....1..0..0..0..0..0....0..1..1..0..1..1 %e A202374 ..0..1..0..1..0..1....0..1..0..1..0..1....0..1..1..0..0..0....1..0..1..1..0..1 %e A202374 ..1..0..1..0..1..0....1..0..1..0..0..0....1..0..1..0..0..0....0..1..0..1..1..0 %e A202374 ..0..1..1..0..1..1....1..1..0..1..0..1....0..1..0..0..0..0....1..0..0..0..0..0 %e A202374 ..1..0..0..0..0..0....0..1..0..1..0..0....1..0..1..0..0..0....1..1..0..1..0..0 %K A202374 nonn %O A202374 1,1 %A A202374 _R. H. Hardin_ Dec 18 2011