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Number of nX4 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.
1

%I #4 Nov 25 2016 07:38:36

%S 0,1076,210616,20667190,1386399220,71471902148,3014441325194,

%T 108332967120296,3414333388975884,96390462710001643,

%U 2476398000574388212,58596033969288185394,1288713602013678461961,26531650462405865691808

%N Number of nX4 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

%C Column 4 of A278656.

%H R. H. Hardin, <a href="/A278652/b278652.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

%Y Cf. A278656.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 25 2016