A153601 Numbers representable as Phi(k,2), the k-th cyclotomic polynomial evaluated at 2, for some k>0.

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

Offset: 1

Author

Artur Jasinski, Dec 29 2008

Keywords

• nonn

Comments

Odd numbers in A019320.

For primes in this sequence see: A153602.

Crossrefs

Cf. A019320, A153443, A153602.

Extensions

Edited by T. D. Noe, Apr 27 2009