A216611 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of an nX7 array with new integer colors introduced in row major order

2, 52, 2847, 2711768, 732209051, 3030359756694, 2043835395791757, 22413340656366875404, 28985266574404467248885, 663445132155786673512833428, 1425339594540323247000177579385

Offset

1,1

Comments

Column 7 of A216612

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=4
..x..0..x..1..x..2..x....x..0..x..1..x..2..x....x..0..x..1..x..2..x
..1..x..2..x..3..x..4....1..x..2..x..3..x..1....1..x..2..x..3..x..4
..x..4..x..5..x..2..x....x..0..x..4..x..2..x....x..5..x..6..x..5..x
..0..x..6..x..4..x..3....5..x..2..x..5..x..0....0..x..2..x..1..x..7

Crossrefs

Sequence in context: A174779 A215744 A099882 * A246485 A340837 A121293

Adjacent sequences: A216608 A216609 A216610 * A216612 A216613 A216614

Keyword

nonn

Author

R. H. Hardin Sep 10 2012

Status

approved