A216080 Number of horizontal and antidiagonal neighbor colorings of the odd squares of an nX4 array with new integer colors introduced in row major order.

1, 4, 42, 602, 15144, 433252, 18378580, 839621092, 52183667212, 3404551437592, 286529186194664, 24947253698767632, 2701657928740913416, 299900819552115769424, 40316833236311531705440, 5520994078882300886182032

Offset: 1

Author

R. H. Hardin Sep 01 2012

Keywords

• nonn

Comments

Column 4 of A216084

Examples

			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..3..x....2..x..3..x....2..x..3..x....1..x..2..x....2..x..3..x
..x..1..x..2....x..4..x..5....x..4..x..1....x..3..x..1....x..1..x..0
..3..x..0..x....6..x..0..x....5..x..3..x....0..x..4..x....4..x..3..x
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..78