A252607 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8

614, 1379, 7031, 43595, 814008, 18149682, 264208755, 20242422160, 1522124858981, 42395868461890, 14000609139123559, 3574765128709630292, 176664651123173436852, 264482342241904185286080

Offset

1,1

Comments

Diagonal of A252615

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A252608 A252615 A252616 * A210103 A191938 A195809

Adjacent sequences: A252604 A252605 A252606 * A252608 A252609 A252610

Keyword

nonn

Author

R. H. Hardin, Dec 19 2014

Status

approved