id:A141242 - OEIS Search Results

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a(n) = number of divisors of nth positive integer with a prime number of divisors. a(n) = the number of divisors of A009087(n).

+0
2

2, 2, 3, 2, 2, 3, 2, 2, 5, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 7, 2, 2, 2, 2, 5, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A009087(n) is of the form, p^(a(n)-1), where p is some prime and a(n) is the nth term (which is prime, of course) of this sequence.`
	LINKS	`Leroy Quet, Home Page (listed in lieu of email address)`
	CROSSREFS	`Cf. A009087, A141241.` `Sequence in context: A152727 A087159 A062502 this_sequence A130285 A130451 A046027` `Adjacent sequences: A141239 A141240 A141241 this_sequence A141243 A141244 A141245`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet Jun 16 2008`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 25 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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