A252678 Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7

3654, 10933, 42376, 147462, 722737, 2879551, 10457376, 51419273, 205046275, 746995324, 3673397944, 14669046377, 53468954588, 262743913893, 1050205375254, 3829514694020, 18804575963835, 75225508336924, 274407640324926

Offset

1,1

Comments

Column 7 of A252679

Links

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

Example

Some solutions for n=4
..2..0..0..2..0..0..2..0..3....1..0..1..1..3..1..1..0..1
..1..0..1..1..3..1..1..0..1....0..0..2..0..0..2..0..0..2
..1..1..0..1..1..0..1..1..0....3..1..1..0..1..1..0..1..1
..2..3..0..2..0..0..2..3..0....1..0..1..1..0..1..1..0..1
..1..0..1..1..3..1..1..0..1....0..0..2..0..0..2..0..0..2
..1..1..3..1..1..0..1..1..3....0..1..1..3..1..1..3..1..1

Crossrefs

Sequence in context: A252086 A212852 A183781 * A307937 A190923 A255088

Adjacent sequences: A252675 A252676 A252677 * A252679 A252680 A252681

Keyword

nonn

Author

R. H. Hardin, Dec 20 2014

Status

approved