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%I #4 Dec 25 2013 14:47:15
%S 106,5606,1131708,902381482,2857237950632,36116482489037416,
%T 1828227876741151008626,371458871749141017729716430,
%U 303446808354142538935528752787416
%N Number of (n+1)X(n+1) 0..7 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1
%C Diagonal of A234421
%e Some solutions for n=2
%e ..3..4..3....3..2..3....1..0..0....5..5..5....6..7..7....2..2..2....6..6..6
%e ..3..3..3....3..2..3....0..0..0....6..6..5....7..6..6....2..2..1....5..5..6
%e ..2..3..3....2..3..3....0..1..0....5..6..5....7..7..6....1..2..2....6..6..5
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 25 2013