A278413 - OEIS

%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