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A153601 Numbers representable as Phi(k,2), the k-th cyclotomic polynomial evaluated at 2, for some k>0. 2
1, 3, 5, 7, 11, 13, 17, 31, 43, 57, 73, 127, 151, 205, 241, 257, 331, 683, 2047, 2359, 2731, 3277, 4033, 5419, 8191, 43691, 61681, 65281, 65537, 80581, 131071, 174763, 261633, 262657, 524287, 599479, 838861, 1016801, 1082401, 1397419, 2796203 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Odd numbers in A019320.

For primes in this sequence see: A153602

For composites see: A153603

LINKS

Table of n, a(n) for n=1..41.

CROSSREFS

Cf. A153443

Sequence in context: A228118 A136186 A023210 * A153602 A136187 A328489

Adjacent sequences:  A153598 A153599 A153600 * A153602 A153603 A153604

KEYWORD

nonn

AUTHOR

Artur Jasinski, Dec 29 2008

EXTENSIONS

Edited by T. D. Noe, Apr 27 2009

STATUS

approved

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Last modified January 19 06:34 EST 2020. Contains 331033 sequences. (Running on oeis4.)