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%I #5 Feb 06 2014 05:39:42
%S 81,5433,1415117,2009833839,12453653921528,375668394257449657,
%T 52886756103540949611731,35743217612825270842283657485,
%U 114859451539181968613471272133306734
%N Number of (n+1)X(n+1) 0..2 arrays with the upper median of every 2X2 subblock equal
%C Diagonal of A237308
%H R. H. Hardin, <a href="/A237300/b237300.txt">Table of n, a(n) for n = 1..10</a>
%e Some solutions for n=2
%e ..0..2..2....0..1..1....1..0..2....0..2..0....0..1..2....2..0..1....2..2..2
%e ..0..2..0....0..1..2....2..2..0....2..2..0....1..1..1....0..2..2....2..2..0
%e ..2..2..0....1..1..1....0..0..2....0..0..2....1..1..0....1..2..0....2..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 06 2014
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