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A263738 Number of length n arrays of permutations of 0..n-1 with each element moved by -2 to 2 places and equal numbers of elements moved upwards and downwards 1
1, 2, 4, 10, 19, 43, 90, 202, 434, 971, 2133, 4780, 10634, 23918, 53667, 121159, 273464, 619510, 1404284, 3190779, 7256305, 16529258, 37686110, 86028558, 196547581, 449479587, 1028674074, 2356054490, 5399827384, 12383951473, 28417821421 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A263744

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=7

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

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

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

..5....1....5....5....2....2....3....5....4....2....3....1....3....5....1....1

..2....4....3....4....4....6....6....2....3....5....5....3....4....3....2....5

..4....5....6....3....5....5....5....4....5....3....4....6....5....6....6....4

..6....6....4....6....6....4....4....6....6....6....6....5....6....4....5....6

CROSSREFS

Cf. A263744

Sequence in context: A043330 A295961 A219555 * A011963 A083844 A026554

Adjacent sequences:  A263735 A263736 A263737 * A263739 A263740 A263741

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 25 2015

STATUS

approved

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Last modified August 18 13:28 EDT 2018. Contains 313832 sequences. (Running on oeis4.)