id:A134518 - OEIS Search Results

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Least k such that the cyclotomic polynomial Phi(k,x) contains n or -n as a coefficient, where k is restricted to be the product of 3 distinct prime numbers.

+0
3

105, 385, 2431, 2717, 8671, 17119, 19499, 20213, 20213, 34891, 34891, 93439, 93439, 93439, 93439, 93439, 282367, 282367, 282367, 282367, 282367, 282367, 282367, 282367, 282367, 617927, 617927, 849647, 849647, 849647, 849647, 849647, 874507 (list; graph; listen)

	OFFSET	`2,1`
	COMMENT	`It is well-known that k=105 is the first number for which Phi(k,x) has a coefficient other than -1, 0, or 1. See A013594 for the case when k has no restrictions.`
	CROSSREFS	`Sequence in context: A102792 A013594 A136418 this_sequence A078420 A133767 A033593` `Adjacent sequences: A134515 A134516 A134517 this_sequence A134519 A134520 A134521`
	KEYWORD	`nonn`
	AUTHOR	`T. D. Noe (noe(AT)sspectra.com), Oct 29 2007`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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