A251999 - OEIS

%I #4 Dec 12 2014 10:22:50

%S 173871388,79312163374,40596220326266,20811403922202520,

%T 10674144780289546954,5477004140225156474736,

%U 2810624107790172363233942,1442327760209164035443021466,740159863895738957327641607158

%N Number of (n+2)X(7+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 4 5 or 7

%C Column 7 of A252000

%H R. H. Hardin, <a href="/A251999/b251999.txt">Table of n, a(n) for n = 1..19</a>

%e Some solutions for n=1

%e ..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 12 2014