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A075081 Perfect powers p (A001597) such that (p-1)/2 is prime. 2
27, 2187, 1594323, 7509466514979724803946715958257547 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

The next terms are 3^103, 3^541, 3^1091, 3^1367, 3^1627, 3^4177, 3^9011, 3^9551, ...

FORMULA

It can be shown that p must be of the form 3^e with e prime.

CROSSREFS

Cf. A076481, A028491.

Sequence in context: A059118 A017199 A013779 * A017307 A167725 A060629

Adjacent sequences:  A075078 A075079 A075080 * A075082 A075083 A075084

KEYWORD

nonn

AUTHOR

Zak Seidov, Oct 16 2002

EXTENSIONS

Extended by Dean Hickerson, Oct 16 2002

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Last modified February 14 11:36 EST 2012. Contains 205623 sequences.