id:A121846 - OEIS Search Results

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Numbers m such that greatest prime divisor of (m-th prime + 1) is 5.

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8, 10, 17, 22, 24, 35, 41, 46, 52, 57, 72, 87, 92, 95, 109, 128, 140, 204, 207, 228, 239, 256, 303, 357, 393, 417, 430, 558, 646, 669, 685, 712, 950, 1117, 1198, 1315, 1389, 1454, 1526, 1543, 1600, 1794, 2140, 2289, 2312, 2425, 2571, 2851, 3368, 3613, 3824 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Or, position of 5 in A023509 Greatest prime divisor of n-th prime + 1.`
	FORMULA	`A023509(m)=5.`
	MATHEMATICA	`Reap[Do[If[FactorInteger[Prime[n]+1][[ -1, 1]]==5, Sow[n]], {n, 5000}]][[2, 1]]`
	CROSSREFS	`Cf. A023509.` `Adjacent sequences: A121843 A121844 A121845 this_sequence A121847 A121848 A121849` `Sequence in context: A061908 A056020 A049510 this_sequence A059094 A143617 A015732`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Sep 09 2006`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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