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A215740 Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the odd squares of an nX3 array with new integer colors introduced in row major order 1
1, 1, 1, 8, 22, 364, 1474, 40612, 211784, 8520924, 53617792, 2916070032, 21317896720, 1489852279864, 12342388117560, 1069484429786480, 9864419605055184, 1031932540617115200, 10458239434388496304 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Column 3 of A215745

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions for n=4

..x..0..x....x..0..x....x..0..x....x..0..x....x..0..x....x..0..x....x..0..x

..1..x..2....1..x..2....1..x..2....1..x..2....1..x..2....1..x..2....1..x..2

..x..3..x....x..3..x....x..3..x....x..3..x....x..3..x....x..3..x....x..3..x

..2..x..0....2..x..1....4..x..0....4..x..5....4..x..1....0..x..1....0..x..4

CROSSREFS

Sequence in context: A217275 A183308 A117613 * A304177 A306834 A109271

Adjacent sequences:  A215737 A215738 A215739 * A215741 A215742 A215743

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 22 2012

STATUS

approved

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Last modified February 29 06:46 EST 2020. Contains 332355 sequences. (Running on oeis4.)