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%I #4 Dec 20 2014 12:58:16
%S 750,630,1005,1525,3185,6645,10933,24685,54782,91577,211344,479362,
%T 805863,1878870,4316287,7281075,17071625,39565761,66917777,157482493,
%U 367387630,622655713,1469264172,3444892538,5848122279,13827395422
%N Number of (2+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7
%C Row 2 of A252679
%H R. H. Hardin, <a href="/A252681/b252681.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 24*a(n-3) -203*a(n-6) +722*a(n-9) -959*a(n-12) -64*a(n-15) +1043*a(n-18) -682*a(n-21) +120*a(n-24) for n>33
%e Some solutions for n=4
%e ..2..0..3..2..2..3....0..2..0..3..2..0....0..1..1..0..1..1....1..3..1..1..0..1
%e ..1..0..1..1..0..1....1..1..0..1..1..0....0..2..3..0..2..0....0..0..2..0..3..2
%e ..1..1..0..1..1..0....3..1..1..0..1..1....1..1..0..1..1..0....3..1..1..0..1..1
%e ..2..0..0..2..3..0....0..2..3..0..2..0....0..1..1..0..1..1....1..0..1..1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 20 2014
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