A211874 - OEIS

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A211874

Primes of the form Phi_k(3), the k-th cyclotomic polynomial evaluated at 3.

2, 7, 13, 61, 73, 547, 757, 1093, 4561, 6481, 368089, 398581, 530713, 797161, 42521761, 47763361, 2413941289, 23535794707, 282429005041, 374857981681, 144542918285300809, 150094634909578633, 13490012358249728401, 82064241848634269407

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..24.

MATHEMATICA

Sort[Select[Cyclotomic[Range[1000], 3], PrimeQ]]

CROSSREFS

Primes in A019321.

Cf. A138933, A072226, A153601.

Sequence in context: A127487 A226140 A180003 * A262830 A072060 A106912

Adjacent sequences: A211871 A211872 A211873 * A211875 A211876 A211877

KEYWORD

nonn

AUTHOR

Alexander Gruber, Feb 12 2013

STATUS

approved