id:A064989 - OEIS Search Results

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Multiplicative with a(2^e)=1 and a(p^e)=prevprime(p)^e for odd primes p.

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1, 1, 2, 1, 3, 2, 5, 1, 4, 3, 7, 2, 11, 5, 6, 1, 13, 4, 17, 3, 10, 7, 19, 2, 9, 11, 8, 5, 23, 6, 29, 1, 14, 13, 15, 4, 31, 17, 22, 3, 37, 10, 41, 7, 12, 19, 43, 2, 25, 9, 26, 11, 47, 8, 21, 5, 34, 23, 53, 6, 59, 29, 20, 1, 33, 14, 61, 13, 38, 15, 67, 4, 71, 31, 18, 17, 35, 22, 73, 3, 16 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`a(20)=a(2^25)=a(2^2)a(5)=prevprime(5)=3.`
	CROSSREFS	`Cf. A003961.` `Adjacent sequences: A064986 A064987 A064988 this_sequence A064990 A064991 A064992` `Sequence in context: A117364 A120250 A116529 this_sequence A030067 A105800 A105602`
	KEYWORD	`mult,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)Eunet.yu), Oct 30 2001`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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