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A266452 Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north neighbor modulo n and the upper left element equal to 0. 1
1, 1, 5, 101, 3417, 184881, 14216101, 1477674733, 199405047857, 33889007175041, 7081268215880805, 1784184251089927605 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A266455.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A266455.

Sequence in context: A210362 A041187 A266235 * A074790 A009757 A119556

Adjacent sequences:  A266449 A266450 A266451 * A266453 A266454 A266455

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 29 2015

STATUS

approved

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Last modified August 24 02:32 EDT 2019. Contains 326260 sequences. (Running on oeis4.)