A216609 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of an nX3 array with new integer colors introduced in row major order.

1, 1, 2, 20, 67, 1335, 6097, 192713, 1094076, 49055292, 329588907, 19602119017, 151146594991, 11399696350555, 98774751736976, 9146845346099410, 87700687826082507, 9731199828137067515, 102042888281439150263

Offset: 1

Author

R. H. Hardin Sep 10 2012

Keywords

• nonn

Comments

Column 3 of A216612

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..97