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A252246 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7 0

%I

%S 318,239,231,267,327,405,501,657,861,1113,1521,2055,2715,3783,5181,

%T 6909,9705,13365,17889,25209,34791,46635,65799

%N Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7

%C Diagonal of A252254

%e Some solutions for n=4

%e ..2..2..0..2..2..0....3..3..3..3..3..3....3..3..3..3..3..3....3..3..2..3..3..2

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

%e ..0..3..1..0..3..1....0..1..0..1..0..1....1..0..1..0..1..0....1..1..0..1..1..0

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

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

%e ..0..3..1..0..3..1....3..0..1..0..1..0....0..1..0..1..0..3....1..1..0..1..1..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 16 2014

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Last modified November 17 00:08 EST 2019. Contains 329209 sequences. (Running on oeis4.)