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

15, 203, 84550, 14050312, 37060769357, 18383354944364, 148049909203591059, 152834703746357948488, 2765650341438362598776986, 4971673449387903153569761420, 170381714096217475684749198312607

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