%I #4 Dec 17 2013 16:09:13

%S 160,3944,194208,26954304,7752002928,6709328689904,11458028594887856,

%T 63725861037698186808

%N Number of (n+1)X(n+1) 0..7 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 30, and no two adjacent values equal

%C Diagonal of A233917

%e Some solutions for n=3

%e ..4..0..4..6....6..5..6..2....6..2..3..6....0..1..4..1....4..2..1..5

%e ..1..2..5..2....4..1..4..1....7..4..7..5....2..5..3..5....3..6..3..2

%e ..4..0..1..0....3..5..6..5....3..2..3..6....0..4..0..4....7..5..7..4

%e ..2..3..5..3....4..1..3..7....1..5..1..5....2..1..2..5....3..6..3..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 17 2013