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%I #4 Dec 14 2013 16:15:17
%S 48,928,28544,2442208,365293440,169016684160,127711201373696,
%T 328477373854376960,1247863750672409103360,17890273200647565664976896
%N Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 6
%C Diagonal of A233682
%e Some solutions for n=3
%e ..1..0..0..2....0..0..0..1....0..2..3..2....0..0..2..0....2..1..1..1
%e ..1..2..1..2....2..1..2..2....0..1..1..2....2..1..1..0....2..0..2..0
%e ..1..0..1..3....2..0..0..1....0..2..0..0....2..0..2..0....1..0..1..1
%e ..2..0..2..3....2..1..2..1....1..1..1..2....1..0..1..1....2..0..2..3
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 14 2013
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