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Search: id:A141453
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| A141453 |
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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.). |
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+0
1
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| 2, 3, 5, 7, 17, 31, 127, 257, 8191, 65537, 131071, 524287, 2147483647, 2305843009213693951, 618970019642690137449562111, 162259276829213363391578010288127, 170141183460469231731687303715884105727
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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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
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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CROSSREFS
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Cf. A000668, A019434.
Sequence in context: A103382 A143027 A001153 this_sequence A100532 A040149 A034970
Adjacent sequences: A141450 A141451 A141452 this_sequence A141454 A141455 A141456
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet Aug 07 2008
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EXTENSIONS
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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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