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A006552
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Numbers n such that n*3^n + 1 is prime.
(Formerly M1848)
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1
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2, 8, 32, 54, 114, 414, 1400, 1850, 2848, 4874, 7268, 19290, 337590
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| H. Dubner, Generalized Cullen numbers, J. Rec. Math., 21 (No. 3, 1989), 190-191.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| G. Loeh, Generalized Cullen primes
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CROSSREFS
| Sequence in context: A200063 A071389 A026369 * A134753 A052481 A067897
Adjacent sequences: A006549 A006550 A006551 * A006553 A006554 A006555
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KEYWORD
| nonn,hard
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008
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