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

%I

%S 120,28288,18151220,19328645044,23161560633508,26947618206791521,

%T 29201160476766771330,29243132244492451384902

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

%C Column 7 of A278727.

%e Some solutions for n=2

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

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

%Y Cf. A278727.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 27 2016

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Last modified October 30 10:25 EDT 2020. Contains 338078 sequences. (Running on oeis4.)