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A153979
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a(n) = prime sum of prime factors of composite(k)=A002808(k).
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1
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5, 7, 7, 13, 11, 19, 11, 11, 11, 17, 11, 13, 31, 13, 13, 23, 13, 43, 17, 13, 13, 17, 19, 13, 19, 61, 23, 73, 17, 41, 23, 19, 47, 17, 19, 29, 19, 103, 29, 17, 109, 17
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Karl Hovekamp, Table of n, a(n) for n=1,...,12285.
Karl Hovekamp, Table of n, a(n), source, factors for n=1,...,12285.
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EXAMPLE
| If A002808(2)=6=2*3 and 2+3=5(prime), then a(1)=5. If A002808(5)=10=2*5 and 2+5=7(prime), then a(2)=7. If A002808(6)=12=2*2*3 and 2+2+3=7(prime), then a(3)=7. If A002808(13)=22=2*11 and 2+11=13(prime), then a(4)=13, etc.
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CROSSREFS
| Cf. A000040, A002808.
Sequence in context: A159482 A033932 A144186 * A126992 A028316 A019163
Adjacent sequences: A153976 A153977 A153978 * A153980 A153981 A153982
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KEYWORD
| nonn
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AUTHOR
| Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 04 2009
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EXTENSIONS
| Corrected and edited by Karl K. Hovekamp (karl.hovekamp(AT)web.de), Dec 05 2009
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