id:A086780 - OEIS Search Results

Search: id:A086780

Displaying 1-1 of 1 results found.

page 1

Number of negative terms in n-th cyclotomic polynomial.

+0
4

1, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 1, 0, 3, 3, 0, 0, 1, 0, 2, 4, 5, 0, 1, 0, 6, 0, 3, 0, 3, 0, 0, 7, 8, 8, 1, 0, 9, 8, 2, 0, 4, 0, 5, 3, 11, 0, 1, 0, 2, 11, 6, 0, 1, 8, 3, 12, 14, 0, 3, 0, 15, 4, 0, 15, 7, 0, 8, 15, 8, 0, 1, 0, 18, 3, 9, 15, 8, 0, 2, 0, 20, 0, 4, 20, 21, 19, 5, 0, 3, 11, 11, 20, 23, 15, 1 (list; graph; listen)

	OFFSET	`1,10`
	REFERENCES	`See A051664`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000`
	FORMULA	`a(n) = 0 iff n is a prime power. - T. D. Noe (noe(AT)sspectra.com), Aug 08 2003`
	MATHEMATICA	`Table[Count[CoefficientList[Cyclotomic[n, x], x], _?(#<0&)], {n, 0, 100}]`
	CROSSREFS	`Cf. A086765, A000961.` `Cf. A051664 (number of nonzero terms in n-th cyclotomic polynomial).` `Sequence in context: A125989 A125924 A082513 this_sequence A158612 A143782 A073430` `Adjacent sequences: A086777 A086778 A086779 this_sequence A086781 A086782 A086783`
	KEYWORD	`nonn`
	AUTHOR	`Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 03 2003`
	EXTENSIONS	`More terms from T. D. Noe (noe(AT)sspectra.com), Aug 08 2003`

page 1

Search completed in 0.004 seconds

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research