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Search: id:A061422
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| A061422 |
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Numbers n such that 2^(n-1) + n is prime. |
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+0
3
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OFFSET
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1,2
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COMMENT
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No other terms below 51674.
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REFERENCES
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J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 237, p. 66, Ellipses, Paris 2008.
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LINKS
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K. S. Brown, The Sum of the Prime Factors of N. MathPages.com
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CROSSREFS
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Cf. A061421.
Equals A100359(n) + 1.
Sequence in context: A105763 A132564 A057619 this_sequence A088097 A064774 A089689
Adjacent sequences: A061419 A061420 A061421 this_sequence A061423 A061424 A061425
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KEYWORD
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hard,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), May 02 2001
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EXTENSIONS
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H. Zeisel found the probable prime 1885. - Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 03 2002
New term 51381 from Nuutti Kuosa (see MathPages link) Max Alekseyev (maxale(AT)gmail.com), Feb 08 2009
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