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!)
A114850 (n-th semiprime)^(n-th semiprime). 10
256, 46656, 387420489, 10000000000, 11112006825558016, 437893890380859375, 5842587018385982521381124421, 341427877364219557396646723584, 88817841970012523233890533447265625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Semiprime analog of A051674. This is also a subset of A113877 "semiprimes to semiprime powers."

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..121

FORMULA

a(n) = A001358(n)^A001358(n).

MATHEMATICA

#^#&/@Select[Range[30], PrimeOmega[#]==2&] (* Harvey P. Dale, Nov 07 2016 *)

CROSSREFS

Cf. A001358, A051674, A113877.

Sequence in context: A187455 A181251 A132637 * A017440 A237068 A204302

Adjacent sequences:  A114847 A114848 A114849 * A114851 A114852 A114853

KEYWORD

easy,nonn

AUTHOR

Jonathan Vos Post, Feb 20 2006

EXTENSIONS

Corrected by Don Reble, Nov 22 2006

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 September 28 22:03 EDT 2020. Contains 337417 sequences. (Running on oeis4.)