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 A235677 #7 Jul 23 2025 08:44:09 %S A235677 9418,650928,44196144,2985166430,201368802704,13578805464958, %T A235677 915571832243030,61732408470815696,4162281818292994236, %U A235677 280639690768870439812,18921978290641266201918,1275803956877960415549616 %N A235677 Number of (n+1)X(6+1) 0..1 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise. %C A235677 Column 6 of A235679 %H A235677 R. H. Hardin, <a href="/A235677/b235677.txt">Table of n, a(n) for n = 1..210</a> %H A235677 R. H. Hardin, <a href="/A235677/a235677.txt">Empirical recurrence of order 87</a> %F A235677 Empirical recurrence of order 87 (see link above) %e A235677 Some solutions for n=1 %e A235677 ..0..1..0..0..1..0..1....0..0..0..1..0..1..0....1..1..1..1..0..0..1 %e A235677 ..0..1..1..0..0..0..0....0..0..0..0..0..0..0....1..1..1..0..1..1..1 %K A235677 nonn %O A235677 1,1 %A A235677 _R. H. Hardin_, Jan 13 2014