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%I #5 Mar 31 2012 12:36:58
%S 637,254359,543848893,7265109130279,632382967906147549
%N Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements
%C Diagonal of A203887
%e Some solutions for n=4
%e ..3..3..0..5..1....3..5..1..6..6....5..5..1..3..3....2..5..1..0..1
%e ..0..3..3..0..5....2..3..5..1..6....6..5..5..1..3....6..2..5..1..6
%e ..1..0..3..3..0....1..2..3..5..1....4..6..5..5..1....1..6..2..5..1
%e ..6..1..0..3..3....0..1..2..3..5....4..4..6..5..5....4..1..6..2..5
%e ..1..2..1..0..3....6..0..1..2..3....4..1..4..6..5....0..4..1..6..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 07 2012