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A159038 a(n) = 8 * n!. 2
8, 16, 48, 192, 960, 5760, 40320, 322560, 2903040, 29030400, 319334400, 3832012800, 49816166400, 697426329600, 10461394944000, 167382319104000, 2845499424768000, 51218989645824000, 973160803270656000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Luis Manuel Rivera, Integer sequences and k-commuting permutations, arXiv preprint arXiv:1406.3081 [math.CO], 2014.
FORMULA
a(n) = 8 * A000142(n) for n > 0.
MAPLE
A159038 := proc(n)
8*n! ;
end proc:
seq(A159038(n), n=1..10) ; # R. J. Mathar, Sep 30 2013
CROSSREFS
Sequence in context: A188825 A214204 A335771 * A235055 A209997 A212764
KEYWORD
easy,nonn
AUTHOR
Zerinvary Lajos, Apr 03 2009
STATUS
approved

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Last modified April 21 17:36 EDT 2024. Contains 371874 sequences. (Running on oeis4.)