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A216027 Number of horizontal, vertical and diagonal neighbor colorings of the odd squares of an nX4 array with new integer colors introduced in row major order 1
1, 5, 29, 371, 6150, 167130, 5219070, 233834847, 11412814314, 741757937068, 51088102234508, 4468693984145541, 407520605922011467, 45668525708806007925, 5279748839226156263229, 732043230152926700952839 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A216031

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

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

..1..x..2..x....2..x..1..x....0..x..2..x....0..x..1..x....2..x..1..x

..x..2..x..3....x..3..x..2....x..1..x..0....x..1..x..2....x..1..x..3

..3..x..4..x....1..x..4..x....3..x..4..x....1..x..3..x....1..x..3..x

CROSSREFS

Sequence in context: A226668 A226666 A289483 * A087899 A202759 A103783

Adjacent sequences:  A216024 A216025 A216026 * A216028 A216029 A216030

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 30 2012

STATUS

approved

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Last modified September 20 01:41 EDT 2020. Contains 337249 sequences. (Running on oeis4.)