A215954 Number of horizontal, vertical and diagonal neighbor colorings of the even squares of an nX3 array with new integer colors introduced in row major order

1, 2, 10, 29, 366, 1534, 35167, 188835, 6618472, 42756208, 2081922515, 15590248868, 993343650912, 8414029179365, 673316834487162, 6340176007793060, 618445940056365121, 6390402969619162909, 742701928727400476918

Offset

1,2

Comments

Column 3 of A215959

Links

R. H. Hardin, Table of n, a(n) for n = 1..41

Example

Some solutions for n=4
..0..x..1....0..x..1....0..x..1....0..x..1....0..x..1....0..x..1....0..x..1
..x..2..x....x..2..x....x..2..x....x..2..x....x..1..x....x..1..x....x..2..x
..2..x..3....2..x..0....2..x..3....1..x..0....2..x..3....1..x..2....2..x..3
..x..4..x....x..1..x....x..0..x....x..3..x....x..4..x....x..0..x....x..1..x

Crossrefs

Sequence in context: A032250 A215790 A133485 * A098425 A098408 A063564

Adjacent sequences: A215951 A215952 A215953 * A215955 A215956 A215957

Keyword

nonn

Author

R. H. Hardin Aug 28 2012

Status

approved