A216030 Number of horizontal, vertical and diagonal neighbor colorings of the odd squares of an nX7 array with new integer colors introduced in row major order

2, 136, 7050, 5219070, 1355988481, 4761748786964

Offset

1,1

Comments

Column 7 of A216031

Links

Table of n, a(n) for n=1..6.

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
..0..x..1..x..3..x..4....0..x..1..x..3..x..4....0..x..1..x..0..x..3
..x..2..x..5..x..4..x....x..2..x..0..x..5..x....x..2..x..4..x..5..x
..2..x..3..x..0..x..3....2..x..3..x..6..x..0....6..x..5..x..7..x..1

Crossrefs

Sequence in context: A065963 A353012 A226118 * A216083 A000662 A139907

Adjacent sequences: A216027 A216028 A216029 * A216031 A216032 A216033

Keyword

nonn

Author

R. H. Hardin Aug 30 2012

Status

approved