A252573 Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 1 2 5 6 or 7.

9936, 47737, 208375, 959944, 6590930, 31059674, 155864925, 994640586, 4728064653, 24277561799, 152128655769, 724041200896, 3737920882959, 23334351446462, 111056940261198, 574039942229995, 3581491498190689

Offset: 1

Author

R. H. Hardin, Dec 18 2014

Keywords

• nonn

Comments

Column 7 of A252574.

Examples

			Some solutions for n=2
..2..3..2..2..3..1..2..3..1....2..3..2..2..3..2..2..3..2
..0..0..1..0..0..2..0..0..2....0..0..2..0..0..1..0..0..2
..2..0..0..2..0..0..2..0..0....2..0..0..2..0..0..2..0..0
..2..3..2..2..3..1..2..3..2....2..3..2..2..3..2..2..3..1
		

Links

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

Crossrefs

Cf. A252574.