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A216335 Number of horizontal and antidiagonal neighbor colorings of the even squares of an nX5 array with new integer colors introduced in row major order 1
2, 12, 602, 12840, 2387180, 99827160, 41521045376, 2751754706832, 2063225889204272, 194478305002268064, 232628053298868289568, 29191372156840204219200, 51464654047934299798487552 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A216338

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..49

EXAMPLE

Some solutions for n=4

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

..x..3..x..4..x....x..3..x..1..x....x..3..x..0..x....x..2..x..3..x

..1..x..5..x..3....2..x..0..x..3....1..x..4..x..5....4..x..1..x..0

..x..4..x..0..x....x..2..x..0..x....x..6..x..7..x....x..0..x..4..x

CROSSREFS

Sequence in context: A002860 A108078 A052129 * A173104 A141770 A230265

Adjacent sequences:  A216332 A216333 A216334 * A216336 A216337 A216338

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 04 2012

STATUS

approved

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Last modified August 17 21:56 EDT 2022. Contains 356189 sequences. (Running on oeis4.)