A187644 Number of (n+2)X7 0..2 arrays with each 3X3 subblock having sum 9

3703651, 9368309, 24351579, 67476109, 234213387

Offset

1,1

Comments

Column 5 of A187645

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for 4X7
..0..1..2..0..1..1..0....0..1..2..1..2..2..0....0..0..2..0..2..1..1
..0..0..1..1..1..2..0....0..2..2..0..2..1..1....0..2..1..1..0..2..0
..1..2..2..0..1..2..1....1..1..0..0..0..1..0....1..2..1..0..2..1..0
..0..1..2..0..1..1..0....1..0..2..2..1..2..1....0..0..2..0..2..1..1

Crossrefs

Sequence in context: A080659 A328215 A216002 * A136287 A254496 A254489

Adjacent sequences: A187641 A187642 A187643 * A187645 A187646 A187647

Keyword

nonn

Author

R. H. Hardin Mar 12 2011

Status

approved