id:A071258 - OEIS Search Results

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a(1) = 4; a(n) = smallest composite number of form k*a(n-1) + 1 with k > 1.

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4, 9, 28, 57, 115, 231, 694, 1389, 2779, 5559, 16678, 33357, 66715, 133431, 400294, 800589, 1601179, 3202359, 9607078, 19214157, 38428315, 76856631, 153713263, 307426527, 614853055, 1229706111, 3689118334, 7378236669, 14756473339 (list; graph; listen)

	OFFSET	`0,1`
	CROSSREFS	`Cf. A061766, A061092, A059411.` `Sequence in context: A007872 A087726 A101973 this_sequence A120333 A000368 A094255` `Adjacent sequences: A071255 A071256 A071257 this_sequence A071259 A071260 A071261`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 30 2002`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)Eunet.yu), Jun 03 2002`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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