%I #6 Sep 05 2022 19:51:32

%S 1,6,38,226,1620,12653,100234,805414,6438451,51548551,412613602,

%T 3302975055,26430263612,211464552217,1691780506515,13534316856401,

%U 108275532447418,866206527440326,6929660831723566,55437290533519366

%N Number of (n+2) X (2+2) 0..2 arrays with each row and column divisible by 11, read as a base-3 number with top and left being the most significant digits.

%C Column 2 of A263333.

%H R. H. Hardin, <a href="/A263331/b263331.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A263333.

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 15 2015