%I #4 Nov 19 2016 12:02:05
%S 56,1590,46236,1429751,44208465,1349344763,41820621848,1335072188627,
%T 42737962734110,1315545171895930,37821745334006837,
%U 1003095347536883940,24492157793238215600,552053288766420787482,11538125658500929877976
%N Number of nX7 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.
%C Column 7 of A278363.
%H R. H. Hardin, <a href="/A278362/b278362.txt">Table of n, a(n) for n = 1..79</a>
%e Some solutions for n=3
%e ..0..0..0..0..0..0..1. .0..0..1..0..0..0..1. .1..0..0..0..0..0..1
%e ..0..1..1..1..0..0..1. .1..1..1..0..0..1..1. .1..0..0..0..1..1..1
%e ..1..0..0..1..0..1..0. .1..1..1..1..1..1..0. .1..0..0..0..1..1..1
%Y Cf. A278363.
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 19 2016