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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A216397 Numbers n that are a nontrivial power (exponent greater than 1) of sopfr(n). 0
256, 19683, 27000, 777600000, 1680700000, 139314069504, 351298031616, 140710042265625, 5766503906250000000000, 1156831381426176000000000000, 58431830141132800000000000, 99938258857146531850367031 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Sopfr(a(n)) = A046346(n+1).

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

139314069504 is in sequence because 139314069504=2^18*3^12;  sopfr(139314069504) = 2*18+3*12 = 72 and 72^6=139314069504.

CROSSREFS

Cf. A046346.

Sequence in context: A176764 A235964 A206319 * A090650 A206181 A251968

Adjacent sequences:  A216394 A216395 A216396 * A216398 A216399 A216400

KEYWORD

nonn

AUTHOR

Antonio Roldán, Sep 06 2012

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified July 25 04:48 EDT 2017. Contains 289779 sequences.