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A215901 Number of diagonal and antidiagonal neighbor colorings of the even squares of an nX5 array with new integer colors introduced in row major order 1
5, 15, 726, 12840, 2387217, 87852626, 37060769357, 2227156082842, 1701536105684377, 148049849095504726, 180712665575010594347, 21183598567292002167082, 38119060864386172887309827 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A215904

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..24

EXAMPLE

Some solutions for n=3

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

..x..3..x..3..x....x..3..x..4..x....x..2..x..2..x....x..3..x..4..x

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

CROSSREFS

Sequence in context: A298510 A318898 A247882 * A112515 A001141 A177364

Adjacent sequences:  A215898 A215899 A215900 * A215902 A215903 A215904

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 26 2012

STATUS

approved

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Last modified October 27 23:26 EDT 2020. Contains 338047 sequences. (Running on oeis4.)