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%I #4 Jan 30 2014 07:24:16
%S 81,1411,68839,17740369,14977205669,41970035313995,367339284802529639,
%T 10214681449663016578969,894198234345435455356272041
%N Number of (n+1)X(n+1) 0..2 arrays with the upper median plus the lower median of every 2X2 subblock equal
%C Diagonal of A236746
%e Some solutions for n=3
%e ..2..1..2..0....0..2..1..2....1..1..1..0....0..1..1..1....1..1..1..2
%e ..0..1..0..2....1..1..1..0....2..1..1..1....2..1..2..0....0..1..0..1
%e ..2..1..1..1....1..1..1..1....1..0..1..1....0..1..0..2....2..1..1..2
%e ..0..1..0..1....2..1..1..0....1..1..1..0....1..1..2..0....1..1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 30 2014
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