A252074 Number of (n+2)X(7+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 or 4.

3279, 23091, 206747, 1669294, 13460641, 110131513, 896763044, 7301549024, 59570598626, 485457428288, 3954090473063, 32222610105491, 262627685087219, 2140187356615074, 17439608164244761, 142114394703257745

Offset: 1

Author

R. H. Hardin, Dec 13 2014

Keywords

• nonn

Comments

Column 7 of A252075

Examples

			Some solutions for n=2
..2..1..2..2..2..1..2..2..2....2..2..1..2..2..2..2..2..2
..2..2..2..1..2..2..2..2..2....2..2..2..2..1..2..2..1..2
..1..2..2..2..2..2..2..2..2....2..2..2..2..2..2..2..2..2
..2..2..2..2..2..2..1..2..2....2..1..2..2..2..2..2..2..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210