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

Author

R. H. Hardin Aug 28 2012

Keywords

• nonn

Comments

Column 3 of A215959

Examples

			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
		

Links

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