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%I #6 Dec 18 2015 18:18:32
%S 4,256,110116,151310069,453578376041,2401987689157097,
%T 19618352087687868206,225161556703631799074083,
%U 3396567436573176749810085543,64088930629934993395801694394536
%N Number of n X n 0..3 arrays with rows and antidiagonals unimodal
%C Diagonal of A223801
%H R. H. Hardin, <a href="/A223795/b223795.txt">Table of n, a(n) for n = 1..11</a>
%e Some solutions for n=3
%e ..0..0..0....0..1..1....2..1..1....2..3..1....2..1..0....2..1..1....2..3..2
%e ..3..0..0....0..2..0....0..3..2....0..3..0....0..2..3....0..3..3....1..3..1
%e ..0..0..0....1..2..2....1..2..3....0..0..1....3..3..1....0..2..2....3..3..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 27 2013
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