A216085 Number of horizontal and antidiagonal neighbor colorings of the odd squares of a 3Xn array with new integer colors introduced in row major order

1, 3, 5, 42, 136, 2440, 10900, 322776, 1805632, 77360796, 514264344, 29562890886, 226109935520, 16604827619828, 142953007039492, 12954736337254696, 123560080110698296, 13465808369740333664, 140585883811112551960

Offset

1,2

Comments

Row 3 of A216084

Links

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

Example

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

Crossrefs

Sequence in context: A158328 A258933 A060433 * A219018 A191088 A191089

Adjacent sequences: A216082 A216083 A216084 * A216086 A216087 A216088

Keyword

nonn

Author

R. H. Hardin Sep 01 2012

Status

approved