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 A251266 #6 Jun 02 2025 10:19:57 %S A251266 502,3894,31936,279718,2510004,22806904,208452452,1910905110, %T A251266 17543333688,161181383956,1481444894708,13618944927408, %U A251266 125212172603876,1151259684237236,10585524477077008,97332520279830066,894966894170134936 %N A251266 Number of (n+1)X(6+1) 0..1 arrays with no 2X2 subblock having x11-x00 less than x10-x01. %C A251266 Column 6 of A251268 %H A251266 R. H. Hardin, <a href="/A251266/b251266.txt">Table of n, a(n) for n = 1..210</a> %H A251266 R. H. Hardin, <a href="/A251266/a251266.txt">Empirical recurrence of order 62</a> %F A251266 Empirical recurrence of order 62 (see link above) %e A251266 Some solutions for n=3 %e A251266 ..0..0..1..1..1..1..1....0..0..0..0..0..1..0....0..0..1..1..1..1..1 %e A251266 ..0..0..0..1..1..1..1....0..0..1..1..1..0..1....0..1..1..1..1..1..1 %e A251266 ..1..1..1..0..0..0..1....0..1..0..0..0..1..1....0..1..1..1..1..1..1 %e A251266 ..0..0..0..1..1..1..1....1..0..1..1..1..1..1....0..0..0..1..1..1..1 %K A251266 nonn %O A251266 1,1 %A A251266 _R. H. Hardin_, Dec 01 2014