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!)
A088816 Numbers of the form p^p - 2 where p is prime. 0
2, 25, 3123, 823541, 285311670609, 302875106592251, 827240261886336764175, 1978419655660313589123977, 20880467999847912034355032910565, 2567686153161211134561828214731016126483467 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Sum of reciprocals = 0.5403214192032919719402677251

LINKS

Table of n, a(n) for n=1..10.

FORMULA

a(n) = A088730(n)-1=A088731(n)+1. - R. J. Mathar, Apr 26 2007

MATHEMATICA

#^#-2&/@Prime[Range[10]] (* Harvey P. Dale, Sep 22 2014 *)

PROG

(PARI) ptop(n, m) = { sr=0; forprime(x=2, n, y=x^x-m; print1(y", "); sr += 1.0/y; ); print(); print(sr) }

CROSSREFS

Sequence in context: A203747 A278273 A210836 * A323589 A141415 A056948

Adjacent sequences:  A088813 A088814 A088815 * A088817 A088818 A088819

KEYWORD

nonn

AUTHOR

Cino Hilliard, Nov 23 2003

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 April 10 07:44 EDT 2021. Contains 342843 sequences. (Running on oeis4.)