id:A061766 - OEIS Search Results

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

+0
4

4, 9, 10, 21, 22, 45, 46, 93, 94, 95, 96, 289, 290, 291, 292, 585, 586, 1173, 1174, 1175, 1176, 1177, 1178, 1179, 1180, 2361, 2362, 2363, 2364, 2365, 2366, 2367, 2368, 2369, 2370, 4741, 4742, 4743, 4744, 4745, 4746, 4747, 4748, 4749, 4750, 9501, 9502, 9503 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`After 96 the next term is 289 = 3*96+ 1 as 97 and 193 are both primes.`
	CROSSREFS	`Sequence in context: A107621 A098144 A109412 this_sequence A109448 A062398 A030754` `Adjacent sequences: A061763 A061764 A061765 this_sequence A061767 A061768 A061769`
	KEYWORD	`nonn,easy`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 22 2001`
	EXTENSIONS	`More terms from Larry Reeves (larryr(AT)acm.org), May 29 2001`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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