A216462 Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of a 4Xn array with new integer colors introduced in row major order

2, 5, 20, 203, 3429, 83440, 2711768, 112073062, 5691327040, 346212384169, 24737419691764, 2043836452962923, 192779435018929754, 20538493062072286871, 2449347793873500266618, 324446721789278481458200

Offset

1,1

Comments

Row 4 of A216460

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

Some solutions for n=4
..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x
..x..2..x..0....x..2..x..3....x..2..x..3....x..2..x..3....x..2..x..3
..3..x..4..x....0..x..4..x....1..x..4..x....3..x..0..x....4..x..0..x
..x..5..x..1....x..2..x..5....x..5..x..3....x..4..x..2....x..5..x..4

Crossrefs

Sequence in context: A261005 A158872 A308522 * A006893 A003163 A088498

Adjacent sequences: A216459 A216460 A216461 * A216463 A216464 A216465

Keyword

nonn

Author

R. H. Hardin Sep 07 2012

Status

approved