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%I #4 Oct 23 2015 12:29:30
%S 12,311,8839,277563,8877675,283980648,9086924328,290780258468,
%T 9304960612844,297758659251901,9528276948222220,304904861127956713,
%U 9756955544927083173,312222577382913349135,9991122476200058211783
%N Number of (n+1)X(2+1) 0..6 arrays with each row and column divisible by 11, read as a base-7 number with top and left being the most significant digits.
%C Column 2 of A263672.
%H R. H. Hardin, <a href="/A263668/b263668.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3
%e ..4..5..0....0..6..2....2..4..6....2..0..1....2..0..1....4..3..3....2..3..2
%e ..4..0..2....4..1..6....0..0..0....6..5..1....6..6..5....0..3..1....0..1..4
%e ..2..6..3....6..0..3....2..0..1....1..2..3....4..0..2....2..6..3....5..4..2
%e ..2..3..2....4..5..0....4..3..3....3..5..5....4..3..3....0..3..1....5..5..6
%Y Cf. A263672.
%K nonn
%O 1,1
%A _R. H. Hardin_, Oct 23 2015