A278653 - OEIS

%I #4 Nov 25 2016 07:39:48

%S 6,19893,6920404,1386399220,208991393214,25885621037640,

%T 2738085955639984,253197559557136896,20837244744657222577,

%U 1548877617380719532356,105295704767594170862145,6615650045831782073579069

%N Number of nX5 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

%C Column 5 of A278656.

%H R. H. Hardin, <a href="/A278653/b278653.txt">Table of n, a(n) for n = 1..101</a>

%e Some solutions for n=2

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

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

%Y Cf. A278656.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 25 2016