login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A062833 2n! / number of divisors of n. 0
2, 2, 6, 16, 120, 360, 5040, 20160, 241920, 1814400, 39916800, 159667200, 6227020800, 43589145600, 653837184000, 8369115955200, 355687428096000, 2134124568576000, 121645100408832000, 810967336058880000 (list; graph; refs; listen; history; text; internal format)
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: A060165 A134295 A184845 * A006250 A006249 A216971

Adjacent sequences:  A062830 A062831 A062832 * A062834 A062835 A062836

KEYWORD

easy,nonn

AUTHOR

Jason Earls, Jul 20 2001

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 22 10:48 EST 2021. Contains 340362 sequences. (Running on oeis4.)