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Number of (n+1)X(n+1) 0..4 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11
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%I #4 Dec 21 2013 09:25:11

%S 72,1540,40384,2047712,125726800,20127064876,3176900588064,

%T 1963380942087312

%N Number of (n+1)X(n+1) 0..4 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11

%C Diagonal of A234217

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 21 2013