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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 (list; graph; refs; listen; history; text; internal format)
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 A136045

Adjacent sequences:  A216077 A216078 A216079 * A216081 A216082 A216083

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 01 2012

STATUS

approved

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Last modified December 8 03:17 EST 2021. Contains 349590 sequences. (Running on oeis4.)