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A229560 Number of arrays of length n that are sums of 2 consecutive elements of length n+1 permutations of 0..n 0
1, 6, 16, 120, 648, 5040, 38592, 362880, 3600000, 39916800, 476928000, 6227020800, 87127488000, 1307674368000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A229565

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

All solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A218976 A173737 A152663 * A113561 A080809 A223098

Adjacent sequences:  A229557 A229558 A229559 * A229561 A229562 A229563

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 26 2013

STATUS

approved

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Last modified January 28 00:32 EST 2020. Contains 331313 sequences. (Running on oeis4.)