A278551 - OEIS

%I #4 Nov 23 2016 07:58:08

%S 456,385040,256173362,157222953688,81144920762300,35461508433808988,

%T 13763018389926177995,4934142560387144138930,

%U 1663165686767641686800894,527405729349278899694924962,156386875782050138370221520321

%N Number of nX5 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

%C Column 5 of A278553.

%H R. H. Hardin, <a href="/A278551/b278551.txt">Table of n, a(n) for n = 1..50</a>

%e Some solutions for n=1

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

%Y Cf. A278553.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 23 2016