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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 0
5, 52, 17733, 2711768, 6423148007, 3030359756694, 22530453266592757, 22413340656366875404, 380159173982235374080849, 663445132155786673512833428, 21523865504501144083392978709171 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A216460

LINKS

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

EXAMPLE

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

CROSSREFS

Sequence in context: A208303 A215902 A215846 * A107803 A255579 A088712

Adjacent sequences:  A216456 A216457 A216458 * A216460 A216461 A216462

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 07 2012

STATUS

approved

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Last modified August 3 14:40 EDT 2021. Contains 346438 sequences. (Running on oeis4.)