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Number of nX5 0..4 arrays of sums of 2X2 subblocks of some (n+1)X6 binary array with rows and columns of the latter in lexicographically nondecreasing order
1

%I #4 Jun 25 2013 21:02:39

%S 28,729,11325,180712,2601925,33118416,369163839,3630637294,

%T 31856129416,252318062428,1823504154187,12137736643546,75012367805101,

%U 433388500017180,2354668881960077,12091925893979800,58950535990057164

%N Number of nX5 0..4 arrays of sums of 2X2 subblocks of some (n+1)X6 binary array with rows and columns of the latter in lexicographically nondecreasing order

%C Column 5 of A226992

%H R. H. Hardin, <a href="/A226991/b226991.txt">Table of n, a(n) for n = 1..67</a>

%e Some solutions for n=4

%e ..0..0..1..2..3....0..0..0..1..2....0..0..1..2..2....0..0..1..3..4

%e ..1..2..2..1..1....0..1..2..2..1....1..2..3..4..3....1..2..2..2..2

%e ..3..4..2..0..0....0..2..4..3..2....2..2..3..4..3....2..4..2..0..0

%e ..4..4..3..1..0....1..2..3..3..3....3..2..3..4..2....3..4..3..1..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 25 2013