A216459 Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of an nX7 array with new integer colors introduced in row major order.
5, 52, 17733, 2711768, 6423148007, 3030359756694, 22530453266592757, 22413340656366875404, 380159173982235374080849, 663445132155786673512833428, 21523865504501144083392978709171
Offset: 1
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Some solutions for n=4 ..0..x..1..x..2..x..3....0..x..1..x..2..x..3....0..x..1..x..2..x..3 ..x..2..x..3..x..0..x....x..2..x..0..x..4..x....x..2..x..0..x..4..x ..0..x..4..x..5..x..3....0..x..1..x..2..x..1....0..x..5..x..6..x..7 ..x..5..x..0..x..2..x....x..5..x..4..x..6..x....x..4..x..1..x..0..x
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