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A107608 Perfect powers which have the form prime(n) - n for some n. 3
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; text; internal format)
OFFSET

1,3

COMMENTS

Corresponding n's in A107607.

LINKS

Table of n, a(n) for n=1..40.

FORMULA

a(n) = prime(A107607(n)) - A107607(n).

MATHEMATICA

f[n_] := Prime[n] - n; Select[f /@ Range[10^4], ! GCD @@ Last /@ FactorInteger[ # ] == 1 &] (* Ray Chandler, May 21 2005 *)

CROSSREFS

Cf. A001597 (perfect powers), A107605, A107606, A107607 (associated n).

Sequence in context: A225418 A035140 A050694 * A219951 A209333 A131610

Adjacent sequences:  A107605 A107606 A107607 * A107609 A107610 A107611

KEYWORD

nonn

AUTHOR

Zak Seidov, May 17 2005

EXTENSIONS

Extended by Ray Chandler, May 21 2005

STATUS

approved

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Last modified March 25 01:17 EDT 2019. Contains 321450 sequences. (Running on oeis4.)