Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #4 Dec 06 2014 10:46:45
%S 6978,49956,163318,610082,5248890,17185778,63447690,562400186,
%T 1826236602,6707952986,60713749434,196015117610,717238558554,
%U 6591100286714,21191371865802,77327675043578,718376458646010,2302904073545738
%N Number of (n+2)X(7+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 2 4 5 7 or 9
%C Column 7 of A251652
%H R. H. Hardin, <a href="/A251651/b251651.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 4*a(n-1) +3*a(n-2) +101*a(n-3) -438*a(n-4) -329*a(n-5) +990*a(n-6) -220*a(n-7) -110*a(n-8) for n>13
%e Some solutions for n=3
%e ..1..0..2..1..0..2..1..3..2....3..2..1..0..2..1..0..2..1
%e ..1..3..2..1..3..2..1..0..2....0..2..1..0..2..1..3..2..1
%e ..1..3..2..1..3..2..1..3..2....0..2..1..3..2..1..0..2..1
%e ..1..0..2..1..0..2..1..3..2....3..2..1..0..2..1..0..2..1
%e ..1..0..2..1..3..2..1..0..2....3..2..1..3..2..1..3..2..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 06 2014