id:A070536 - OEIS Search Results

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Number of terms in n-th cyclotomic polynomial minus largest prime factor of n; a(1)=1 by convention.

+0
3

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 4, 0, 10, 0, 0, 0, 4, 0, 0, 2, 0, 0, 2, 0, 0, 0, 0, 0, 6, 0, 0, 0, 6, 0, 6, 0, 0, 2, 0, 0, 2, 0, 18, 4, 0, 0, 8, 10, 0, 0, 0, 0, 2, 0, 20, 4, 0, 0, 0, 0, 0, 2, 24, 0, 10, 0, 0, 2, 10, 0, 10, 0, 12, 0, 0, 0, 4 (list; graph; listen)

	OFFSET	`1,15`
	COMMENT	`When (as at n=105) coefficients are not equal 1 or -1 then terms in C[n,x] are counted with multiplicity.`
	EXAMPLE	`n=21: Cyclotomic[21,x]=1-x+x^3-x^4+x^6-x^8+x^9-x^11+x^12 has 9 terms while largest prime factor of 21 is 7`
	CROSSREFS	`a(n)=A051664[n]-A06530[n].` `Cf. A006530, A051664, A070537, A070776.` `Adjacent sequences: A070533 A070534 A070535 this_sequence A070537 A070538 A070539` `Sequence in context: A117370 A112053 A089798 this_sequence A030201 A055668 A045839`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), May 03 2002`

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.

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