A252621 Number of (6+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

5503, 37917, 153189, 617798, 4274586, 18149682, 82404422, 571397644, 2451795723, 11526421874, 81714444770, 352505179731, 1676004467136, 12066830677075, 52201486791538, 249256160558604, 1809616167926962, 7839226018586938

Offset

1,1

Comments

Row 6 of A252615

Links

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

Example

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

Crossrefs

Sequence in context: A031617 A045132 A096702 * A234561 A252511 A250876

Adjacent sequences: A252618 A252619 A252620 * A252622 A252623 A252624

Keyword

nonn

Author

R. H. Hardin, Dec 19 2014

Status

approved