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

1,2

Comments

Column 4 of A216084

Links

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

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..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

Crossrefs

Sequence in context: A151453 A234507 A153854 * A137645 A340939 A355410

Adjacent sequences: A216077 A216078 A216079 * A216081 A216082 A216083

Keyword

nonn

Author

R. H. Hardin Sep 01 2012

Status

approved