A216336 Number of horizontal and antidiagonal neighbor colorings of the even squares of an nX6 array with new integer colors introduced in row major order

2, 42, 2440, 373780, 87852160, 37060650272, 20358402201792, 17131843186425504, 17423570614012565376, 24860319276726031245440, 41082882676098706722895360, 90015726535715347904300537088, 222247072052822589353800809064448

Offset

1,1

Comments

Column 6 of A216338

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

Some solutions for n=4
..0..x..1..x..0..x....0..x..1..x..0..x....0..x..1..x..2..x....0..x..1..x..0..x
..x..2..x..3..x..1....x..2..x..3..x..4....x..0..x..3..x..4....x..2..x..3..x..2
..1..x..0..x..2..x....1..x..5..x..0..x....4..x..5..x..1..x....1..x..4..x..0..x
..x..3..x..4..x..3....x..4..x..5..x..2....x..6..x..3..x..2....x..0..x..2..x..0

Crossrefs

Sequence in context: A216029 A124103 A235776 * A152286 A293864 A208297

Adjacent sequences: A216333 A216334 A216335 * A216337 A216338 A216339

Keyword

nonn

Author

R. H. Hardin Sep 04 2012

Status

approved