A252573 Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 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

1,1

Comments

Column 7 of A252574

Links

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

Example

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

Crossrefs

Sequence in context: A252227 A252622 A031856 * A266917 A031858 A254975

Adjacent sequences: A252570 A252571 A252572 * A252574 A252575 A252576

Keyword

nonn

Author

R. H. Hardin, Dec 18 2014

Status

approved