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Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7
1

%I #4 Dec 11 2014 06:39:12

%S 12872,34396,153792,856022,5742474,36065236,249690188,1610617806,

%T 11148308670,71796251804,499209800968,3217851653774,22340736113682,

%U 143989452210488,1000381251221086,6447937099979436,44784252890865612

%N Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7

%C Column 7 of A251923

%H R. H. Hardin, <a href="/A251922/b251922.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 11 2014