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%I #4 Dec 01 2014 19:13:54
%S 39,1115,75391,13857083,8130801167,16682303832387,119455642968747047,
%T 2906457494360881156619,236005702652830583741374855,
%U 63305022966063301195370267957275
%N Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to 2 4 or 6
%C Diagonal of A251335
%e Some solutions for n=3
%e ..0..0..0..0....0..2..0..2....0..0..0..2....0..2..0..0....2..2..2..2
%e ..2..2..2..2....2..0..2..2....2..2..0..2....2..0..2..2....0..2..0..2
%e ..2..0..0..0....2..0..2..0....2..0..0..0....2..2..0..0....0..2..0..2
%e ..1..1..1..1....2..0..0..0....2..0..2..2....0..2..2..0....0..0..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 01 2014