A086389 - OEIS

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A086389

Number of factors over Q in the factorization of U_n(x) - 1 where U_n(x) is the Chebyshev polynomial of the second kind.

1, 1, 2, 3, 2, 3, 3, 4, 3, 4, 2, 6, 4, 3, 4, 6, 2, 6, 4, 6 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	CROSSREFS	`Cf. A086375.` `Sequence in context: A078627 A106370 A128630 * A128622 A026256 A079715` `Adjacent sequences: A086386 A086387 A086388 * A086390 A086391 A086392`
	KEYWORD	`nonn`
	AUTHOR	`Yuval Dekel (dekelyuval(AT)hotmail.com), Sep 08 2003`

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Last modified February 15 19:15 EST 2012. Contains 205852 sequences.