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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
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 01 2012
STATUS
approved