A278632 - OEIS

%I #4 Nov 24 2016 10:22:02

%S 357,175881,48592635,11719632199,2593097277036,521528860552802,

%T 94782697883923436,15624069731088285787,2357725621673408985921,

%U 329332639476242364241409,43040255418713805460253898

%N Number of nX6 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

%C Column 6 of A278634.

%H R. H. Hardin, <a href="/A278632/b278632.txt">Table of n, a(n) for n = 1..46</a>

%e Some solutions for n=2

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

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

%Y Cf. A278634.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 24 2016