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A215903 Number of diagonal and antidiagonal neighbor colorings of the even squares of an nX7 array with new integer colors introduced in row major order 0
15, 203, 84550, 14050312, 37060769357, 18383354944364, 148049909203591059, 152834703746357948488, 2765650341438362598776986, 4971673449387903153569761420, 170381714096217475684749198312607 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A215904

LINKS

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

EXAMPLE

Some solutions for n=3

..0..x..1..x..2..x..3....0..x..1..x..2..x..3....0..x..0..x..1..x..2

..x..4..x..4..x..5..x....x..4..x..5..x..4..x....x..3..x..4..x..5..x

..6..x..6..x..0..x..1....0..x..0..x..0..x..3....6..x..1..x..0..x..2

CROSSREFS

Sequence in context: A012566 A238992 A216465 * A070968 A075280 A093747

Adjacent sequences:  A215900 A215901 A215902 * A215904 A215905 A215906

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 26 2012

STATUS

approved

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Last modified September 22 00:42 EDT 2020. Contains 337276 sequences. (Running on oeis4.)