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 A186910 #8 Jul 22 2025 10:34:49 %S A186910 22000126445,2536761070723,171334955820947,8185872059408158, %T A186910 300268014063911584,8880688768983407407,219019175194540430058, %U A186910 4617630757685272558765,84844963231516976756260 %N A186910 Number of (n+2)X6 0..6 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order. %C A186910 Column 4 of A186915 %H A186910 R. H. Hardin, <a href="/A186910/b186910.txt">Table of n, a(n) for n = 1..200</a> %H A186910 R. H. Hardin, <a href="/A186910/a186910.txt">Polynomial of degree 101</a> %F A186910 Polynomial of degree 101 in n, see link. %e A186910 Some solutions for 4X6 %e A186910 ..0..0..0..0..0..4....0..0..0..0..0..3....0..0..0..0..0..5....0..0..0..0..0..0 %e A186910 ..0..0..0..0..2..5....0..0..0..0..1..2....0..0..0..0..2..2....0..0..0..0..0..6 %e A186910 ..0..0..0..0..3..5....0..0..0..0..1..3....0..0..0..0..2..5....0..0..0..0..1..1 %e A186910 ..0..0..0..0..6..2....0..0..0..0..5..4....0..0..0..0..5..2....0..0..0..0..3..1 %K A186910 nonn %O A186910 1,1 %A A186910 _R. H. Hardin_ Feb 28 2011