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 A186909 #8 Jul 22 2025 10:34:43 %S A186909 1276581035,99241308567,4813465754996,171334955820947, %T A186909 4805827783188400,110909004238159456,2169936652932512523, %U A186909 36804096662464163093,550615265988952206164,7367827886026471340866,89189622390253052611607 %N A186909 Number of (n+2)X5 0..6 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order. %C A186909 Column 3 of A186915 %H A186909 R. H. Hardin, <a href="/A186909/b186909.txt">Table of n, a(n) for n = 1..200</a> %H A186909 R. H. Hardin, <a href="/A186909/a186909.txt">Polynomial of degree 95</a> %F A186909 Polynomial of degree 95 in n, see link. %e A186909 Some solutions for 4X5 %e A186909 ..0..0..0..0..6....0..0..0..1..2....0..0..0..0..1....0..0..0..0..2 %e A186909 ..0..0..0..0..6....0..0..0..2..2....0..0..0..1..4....0..0..0..2..5 %e A186909 ..0..0..0..6..4....0..0..0..3..4....0..0..0..2..2....0..0..0..4..0 %e A186909 ..0..0..0..6..5....0..0..0..6..2....0..0..0..6..6....0..0..0..4..0 %K A186909 nonn %O A186909 1,1 %A A186909 _R. H. Hardin_ Feb 28 2011