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!)
A063101 a(n) is the number of divisors of n!*(n! + 1)/2. 1
1, 1, 2, 4, 18, 36, 96, 144, 336, 1120, 960, 960, 4320, 5760, 9504, 29568, 161280, 80640, 884736, 110592, 155520, 460800, 729600, 2188800, 929280, 1300992, 2040192, 1298304, 3528000, 14112000, 71884800, 71884800, 85708800, 243793920 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Harry J. Smith, Table of n, a(n) for n = 0..60

PROG

(PARI) a(n)={numdiv(n!*(n! + 1)/2)}

CROSSREFS

Cf. A055555.

Sequence in context: A054300 A303360 A303442 * A143533 A064723 A301620

Adjacent sequences:  A063098 A063099 A063100 * A063102 A063103 A063104

KEYWORD

nonn

AUTHOR

Jason Earls, Aug 07 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 March 2 19:18 EST 2021. Contains 341756 sequences. (Running on oeis4.)