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A085723
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Number of prime divisors of n^n+1 (counted with multiplicity).
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0
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1, 1, 3, 1, 3, 3, 5, 3, 4, 3, 7, 4, 5, 6, 9, 2, 4, 9, 6, 3, 6, 4, 10, 6, 7, 5, 12, 6, 7, 10, 11, 4, 11, 6, 15, 5, 7, 8, 10, 10, 6, 10, 9, 8, 14, 8, 13, 6, 8, 10, 12, 5, 10, 14, 13, 7, 13, 13, 10, 12, 8, 7, 24, 4, 12, 8, 8, 7, 17, 10, 11, 12
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| 16^16+1 = 274177 * 67280421310721 is a semiprime. Where is the next?
a(73) >= 4. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 27 2010]
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CROSSREFS
| Sequence in context: A029153 A060241 A145015 * A186422 A165027 A078555
Adjacent sequences: A085720 A085721 A085722 * A085724 A085725 A085726
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KEYWORD
| nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Jul 20 2003
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EXTENSIONS
| More terms from Ray G. Opao (1260(AT)email.com), Aug 25 2004
Corrected 8 existing terms and a(46)-a(72) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 27 2010
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