A062833 2n! / number of divisors of n.

2, 2, 6, 16, 120, 360, 5040, 20160, 241920, 1814400, 39916800, 159667200, 6227020800, 43589145600, 653837184000, 8369115955200, 355687428096000, 2134124568576000, 121645100408832000, 810967336058880000

Offset

1,1

Links

Table of n, a(n) for n=1..20.

Mathematica

(2#!)/DivisorSigma[0, #]&/@Range[20]  (* Harvey P. Dale, Feb 04 2011 *)

Prog

(PARI) for(n=1, 23, print((2*n!)/numdiv(n)))

Crossrefs

Sequence in context: A303150 A134295 A184845 * A006250 A006249 A216971

Adjacent sequences: A062830 A062831 A062832 * A062834 A062835 A062836

Keyword

easy,nonn

Author

Jason Earls, Jul 20 2001

Status

approved