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 A186911 #8 Jul 22 2025 10:34:56 %S A186911 319741716426,52666517720011,4805827783188400,300268014063911584, %T A186911 14077041692560748494,522748636954347087650,15954040054059557650482, %U A186911 411179480114108991321807,9138537360691131917393508 %N A186911 Number of (n+2)X7 0..6 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order. %C A186911 Column 5 of A186915 %H A186911 R. H. Hardin, <a href="/A186911/b186911.txt">Table of n, a(n) for n = 1..120</a> %H A186911 R. H. Hardin, <a href="/A186911/a186911.txt">Polynomial of degree 107</a> %F A186911 Polynomial of degree 107 in n, see link. %e A186911 Some solutions for 4X7 %e A186911 ..0..0..0..0..0..0..2....0..0..0..0..0..1..2....0..0..0..0..0..0..2 %e A186911 ..0..0..0..0..0..0..3....0..0..0..0..0..2..3....0..0..0..0..0..1..4 %e A186911 ..0..0..0..0..0..4..0....0..0..0..0..0..5..4....0..0..0..0..0..1..4 %e A186911 ..0..0..0..0..0..5..2....0..0..0..0..0..5..5....0..0..0..0..0..6..3 %K A186911 nonn %O A186911 1,1 %A A186911 _R. H. Hardin_ Feb 28 2011