id:A138933 - OEIS Search Results

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Indices k such that A019321(k)=Phi[k](3) is prime, where Phi is a cyclotomic polynomial.

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1, 3, 6, 7, 9, 10, 12, 13, 14, 15, 21, 24, 26, 33, 36, 40, 46, 60, 63, 70, 71, 72, 86, 103, 108, 130, 132, 143, 145, 154, 161, 236, 255, 261, 276, 279, 287, 304, 364, 430, 464, 513, 528, 541, 562, 665, 672, 680, 707, 718, 747, 760, 782, 828, 875, 892, 974, 984 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Yves Gallot, Cyclotomic polynomials and prime numbers` `Index entries for cyclotomic polynomials, values at X`
	PROGRAM	`(PARI) for( i=1, 999, ispseudoprime( polcyclo(i, 3)) && print1( i", ")) /* use ...subst(polcyclo(i), x, 3)... in PARI < 2.4.2 */`
	CROSSREFS	`Cf. A019321, A072226, A138920-A138940.` `Adjacent sequences: A138930 A138931 A138932 this_sequence A138934 A138935 A138936` `Sequence in context: A088045 A108057 A129414 this_sequence A071530 A005767 A085837`
	KEYWORD	`nonn`
	AUTHOR	`M. F. Hasler (www.univ-ag.fr/~mhasler), Apr 03 2008`

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Last modified January 8 02:43 EST 2009. Contains 152824 sequences.

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