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A107608 Perfect powers which have the form prime(n)-n for some n. 4
1, 1, 25, 32, 125, 128, 441, 529, 729, 961, 1089, 1369, 2025, 2809, 3375, 4489, 4900, 4913, 9216, 10201, 10404, 12167, 16384, 17576, 18225, 20736, 27889, 31684, 34596, 35344, 38416, 38809, 39601, 40804, 46656, 47961, 60516, 61009, 63504, 65025 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

COMMENTS

Corresponding n's in A107607.

FORMULA

A107608(n) = prime[A107607(n)] - A107607(n)

MATHEMATICA

f[n_] := Prime[n] - n; Select[f /@ Range[10^4], ! GCD @@ Last /@ FactorInteger[ # ] == 1 &] (*Chandler*)

CROSSREFS

Cf. A001597, A107605, A107606, A107607.

Sequence in context: A107258 A035140 A050694 * A131610 A134099 A129074

Adjacent sequences:  A107605 A107606 A107607 * A107609 A107610 A107611

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), May 17 2005

EXTENSIONS

Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), May 21 2005

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Last modified February 16 09:00 EST 2012. Contains 205904 sequences.