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Search: id:A141453
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A141453 A prime p is included if p is 1 from a power of 2. (2^k + 1 = p or 2^k - 1 = p, k>=0.). +0
1
2, 3, 5, 7, 17, 31, 127, 257, 8191, 65537, 131071, 524287, 2147483647, 2305843009213693951, 618970019642690137449562111, 162259276829213363391578010288127, 170141183460469231731687303715884105727 (list; graph; listen)
OFFSET

1,1

COMMENT

Sequence consists of 2 and the union of the Mersenne primes (A000668) and the Fermat primes (A019434).

a(18) has 157 digits and is too large to include. - Chandler

LINKS

Leroy Quet, Home Page (listed in lieu of email address)

CROSSREFS

Cf. A000668, A019434.

Sequence in context: A103382 A143027 A001153 this_sequence A100532 A040149 A034970

Adjacent sequences: A141450 A141451 A141452 this_sequence A141454 A141455 A141456

KEYWORD

nonn

AUTHOR

Leroy Quet Aug 07 2008

EXTENSIONS

More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 23 2009

a(17) from Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 22 2009

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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