id:A058888 - OEIS Search Results

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Number of terms in the set invphi(2*p(n)), where p(n) is the n-th prime.

+0
7

4, 4, 2, 0, 2, 0, 0, 0, 2, 2, 0, 0, 2, 0, 0, 2, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 2, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`The set invphi(23)={7,9,14,18}. It has 4 terms, so a(2)=4, while invphi(21601)={3203,6406}, thus a(252)=2.`
	MAPLE	`with(numtheory): [seq(nops(invphi(2*ithprime(i))), i=1..256)];`
	CROSSREFS	`A000010, A005277, A007617, A002202.` `Sequence in context: A111845 A120396 A141024 this_sequence A153015 A153163 A120438` `Adjacent sequences: A058885 A058886 A058887 this_sequence A058889 A058890 A058891`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jan 08 2001`

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

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