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%I #4 Nov 24 2016 08:46:01
%S 504,103546,24103803,6594175430,1892563134910,540194658701142,
%T 152561415660718514,42854095125044269456,11909803616605399424974,
%U 3223604568067184016119193,835430834890906525681829626
%N Number of nX7 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.
%C Column 7 of A278627.
%H R. H. Hardin, <a href="/A278626/b278626.txt">Table of n, a(n) for n = 1..19</a>
%e Some solutions for n=2
%e ..2..0..1..1..1..0..0. .0..2..2..2..2..1..1. .2..2..1..1..0..1..0
%e ..2..1..2..2..2..2..2. .0..2..2..2..2..2..0. .2..2..2..0..2..1..1
%Y Cf. A278627.
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 24 2016
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