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A201537 Number of nX6 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.

%I A201537 #7 Jul 22 2025 16:17:36
%S A201537 13,410,16393,983981,61807736,3762507339,208164634003,10298954399450,
%T A201537 457194210355549,18377434753379050,675525914078702215,
%U A201537 22913890806174601101,722808878339707158532,21342091118575178714919
%N A201537 Number of nX6 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.
%C A201537 Column 6 of A201539
%H A201537 R. H. Hardin, <a href="/A201537/b201537.txt">Table of n, a(n) for n = 1..53</a>
%e A201537 Some solutions for n=3
%e A201537 ..0..0..1..1..2..2....0..0..0..2..2..2....0..0..1..1..1..2....0..0..0..2..2..2
%e A201537 ..0..0..1..2..0..1....0..0..1..1..1..1....1..1..0..1..1..2....0..0..2..1..1..1
%e A201537 ..2..2..1..2..0..1....0..1..1..0..0..0....2..2..0..0..0..0....0..0..2..1..1..1
%K A201537 nonn
%O A201537 1,1
%A A201537 _R. H. Hardin_ Dec 02 2011