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!)
A114127 Numbers that factorize into a prime number of prime factors each raised to a prime exponent. 1
36, 72, 100, 108, 196, 200, 216, 225, 288, 392, 441, 484, 500, 675, 676, 800, 864, 900, 968, 972, 1000, 1089, 1125, 1152, 1156, 1225, 1323, 1352, 1372, 1444, 1521, 1568, 1764, 1800, 1944, 2116, 2312, 2601, 2700, 2744, 2888, 3025, 3087, 3200, 3249, 3267 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

fpnQ[n_]:=Module[{f=FactorInteger[n]}, AllTrue[Flatten[Join[{Length[f], f[[All, 2]]}]], PrimeQ]]; Select[Range[3300], fpnQ] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Dec 01 2018 *)

CROSSREFS

Sequence in context: A192026 A036785 A286708 * A322658 A224830 A044102

Adjacent sequences:  A114124 A114125 A114126 * A114128 A114129 A114130

KEYWORD

nonn

AUTHOR

Jon Wild, Feb 14 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 January 25 03:49 EST 2020. Contains 331241 sequences. (Running on oeis4.)