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 A201151 #7 Jul 22 2025 16:07:45 %S A201151 19,140,860,4572,22183,100362,432048,1791740,7225068,28510387, %T A201151 110629661,423640742,1605361751,6032626211,22517083366,83589139136, %U A201151 308933515758,1137661210293,4177146453272,15300167480847,55930646132694 %N A201151 Number of nX4 0..2 arrays with every diagonal, row and column running average nondecreasing rightwards and downwards and diagonally. %C A201151 Column 4 of A201155 %H A201151 R. H. Hardin, <a href="/A201151/b201151.txt">Table of n, a(n) for n = 1..49</a> %e A201151 Some solutions for n=5 %e A201151 ..0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..0....0..0..0..1 %e A201151 ..0..1..1..1....0..1..1..1....0..0..1..2....0..0..0..0....0..0..1..2 %e A201151 ..0..1..2..1....0..1..2..1....0..1..1..2....0..0..0..1....0..0..2..2 %e A201151 ..0..1..1..1....1..1..2..2....0..2..1..2....0..2..1..2....0..1..2..2 %e A201151 ..0..2..2..2....2..2..2..2....0..2..1..2....1..1..2..2....0..1..2..2 %K A201151 nonn %O A201151 1,1 %A A201151 _R. H. Hardin_ Nov 27 2011