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

5, 15, 726, 12840, 2387217, 87852626, 37060769357, 2227156082842, 1701536105684377, 148049849095504726, 180712665575010594347, 21183598567292002167082, 38119060864386172887309827

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: A371887 A318898 A247882 * A112515 A001141 A177364

Adjacent sequences: A215898 A215899 A215900 * A215902 A215903 A215904

Keyword

nonn

Author

R. H. Hardin Aug 26 2012

Status

approved