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%I #4 Nov 21 2016 09:10:54
%S 1107,1046418,859516239,724313811311,615691843257769,
%T 495717541750226155,361990594590395633400,238604620055755341800773,
%U 144303226542829352792147114,81817177352955986859566458268
%N Number of nX7 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.
%C Column 7 of A278414.
%H R. H. Hardin, <a href="/A278413/b278413.txt">Table of n, a(n) for n = 1..19</a>
%e Some solutions for n=1
%e ..2..1..1..1..2..1..2. .2..0..1..0..0..1..1. .1..2..2..0..2..1..2
%Y Cf. A278414.
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 21 2016