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A278726 Number of nX7 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.

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%I A278726 #3 Nov 27 2016 06:50:28
%S A278726 120,28288,18151220,19328645044,23161560633508,26947618206791521,
%T A278726 29201160476766771330,29243132244492451384902
%N A278726 Number of nX7 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.
%C A278726 Column 7 of A278727.
%e A278726 Some solutions for n=2
%e A278726 ..3..2..1..1..1..0..0. .2..2..2..1..1..1..0. .3..3..2..2..2..0..0
%e A278726 ..3..2..3..1..1..1..0. .3..2..2..2..1..1..3. .3..3..3..2..1..1..1
%Y A278726 Cf. A278727.
%K A278726 nonn
%O A278726 1,1
%A A278726 _R. H. Hardin_, Nov 27 2016

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