login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A068795 In prime factorization of n replace all primes with the greatest prime factor of n; a(1)=1. 6
1, 2, 3, 4, 5, 9, 7, 8, 9, 25, 11, 27, 13, 49, 25, 16, 17, 27, 19, 125, 49, 121, 23, 81, 25, 169, 27, 343, 29, 125, 31, 32, 121, 289, 49, 81, 37, 361, 169, 625, 41, 343, 43, 1331, 125, 529, 47, 243, 49, 125, 289, 2197, 53, 81, 121 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A068794(n)<=n<=a(n);

a(n) = A068794(n) iff n=1 or n=p^k for some prime p, k>0.

a(30)=a(2*3*5)=5*5*5=125.

LINKS

Table of n, a(n) for n=1..55.

FORMULA

a(n) = A006530(n)^A001222(n).

CROSSREFS

Cf. A001222, A006530.

Sequence in context: A130064 A323136 A273285 * A222257 A238535 A072501

Adjacent sequences:  A068792 A068793 A068794 * A068796 A068797 A068798

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Mar 05 2002

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 July 19 03:54 EDT 2019. Contains 325144 sequences. (Running on oeis4.)