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A006599
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Numbers n such that 2^{2n+1} + 2^{n+1} + 1 is prime.
(Formerly M1358)
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1
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0, 1, 2, 5, 9, 14, 78, 81, 141, 189, 498, 5070
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Some of the larger entries may only correspond to probable primes.
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REFERENCES
| J. Brillhart et al., Factorizations of b^n +- 1. Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 2nd edition, 1985; and later supplements.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| S. S. Wagstaff, Jr., The Cunningham Project
J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
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CROSSREFS
| A108062 is essentially the same sequence.
Sequence in context: A068501 A048071 A051892 * A013933 A101201 A184535
Adjacent sequences: A006596 A006597 A006598 * A006600 A006601 A006602
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Sep 07 2002
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