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
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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
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