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A216343 Number of horizontal and antidiagonal neighbor colorings of the even squares of a 7Xn array with new integer colors introduced in row major order 0
15, 409, 115975, 18378580, 41521045376, 20358402201792, 148049849072167133, 152834688133255075552, 2562708952364833106990692 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A216338

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

..2..x..0..x....3..x..1..x....0..x..4..x....5..x..6..x....6..x..3..x

CROSSREFS

Sequence in context: A278981 A279133 A034675 * A184222 A069431 A133791

Adjacent sequences:  A216340 A216341 A216342 * A216344 A216345 A216346

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 04 2012

STATUS

approved

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Last modified May 25 04:05 EDT 2022. Contains 354048 sequences. (Running on oeis4.)