A252456 Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7

9013, 56643, 464384, 3675259, 29527662, 240708592, 1956458824, 15909752456, 129736526156, 1057338390851, 8612567396378, 70179825074444, 571993707723937, 4661686891303170, 37989961554799072, 309598723190609387

Offset

1,1

Comments

Column 7 of A252457

Links

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

Example

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

Crossrefs

Sequence in context: A102484 A295457 A359845 * A196994 A250828 A031593

Adjacent sequences: A252453 A252454 A252455 * A252457 A252458 A252459

Keyword

nonn

Author

R. H. Hardin, Dec 17 2014

Status

approved