login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A302974 a(n) = numerator of tau(n)^n / n^tau(n). 3
1, 1, 8, 81, 32, 256, 128, 16, 27, 65536, 2048, 729, 8192, 16777216, 1073741824, 152587890625, 131072, 2985984, 524288, 892616806656, 4398046511104, 1099511627776, 8388608, 281474976710656, 847288609443, 281474976710656, 18014398509481984, 1499253470328324096 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
tau(n) = the number of the divisors of n (A000005).
a(n) <= A302975(n) only for numbers n = 1, 2 and 3.
LINKS
EXAMPLE
For n = 6; tau(6)^6 / 6^tau(6) = 4^6 / 6^4 = 256 / 81; a(6) = 256.
MATHEMATICA
Numerator[#[[2]]^#[[1]]/#[[1]]^#[[2]]]&/@Table[{n, DivisorSigma[0, n]}, {n, 30}] (* Harvey P. Dale, May 29 2023 *)
PROG
(Magma) [Numerator((NumberOfDivisors(n)^n) / (n^NumberOfDivisors(n))): n in[1..100]]
CROSSREFS
Sequence in context: A002072 A193943 A067449 * A281472 A302625 A078292
KEYWORD
nonn,frac
AUTHOR
Jaroslav Krizek, Apr 16 2018
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)