id:A107608 - OEIS Search Results

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Perfect powers which have the form prime(n)-n for some n.

+0
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; listen)

	OFFSET	`1,3`
	COMMENT	`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 this_sequence A131610 A134099 A129074` `Adjacent sequences: A107605 A107606 A107607 this_sequence 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 December 21 10:15 EST 2009. Contains 171081 sequences.

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