A278733 - OEIS

A278733

Number of n X 7 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

%I #5 Nov 28 2021 12:38:30

%S 2472,3633649,7907770636,19983433877142,50067074390669892,

%T 119979123054325787300,276347089984710259199248,

%U 616342267580395469193910007

%N Number of n X 7 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

%C Column 7 of A278734.

%e Some solutions for n=1

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

%Y Cf. A278734.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 27 2016