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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 Table of n, a(n) for n=1..19. 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 Cf. A000142, A052560, A052578, A052648, A052849, A062098. Sequence in context: A188825 A214204 A335771 * A235055 A209997 A212764 Adjacent sequences: A159035 A159036 A159037 * A159039 A159040 A159041 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.)