id:A153979 - OEIS Search Results

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a(n)= prime sum of prime factors of composite(k)=A002808(k).

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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, 81, 19, 47, 17, 17, 29, 37, 19, 103, 29, 17 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`If A002808(2)=6=23 and 2+3=5(prime), then a(1)=5. If A002808(5)=10=25 and 2+5=7(prime), then a(2)=7. If A002808(6)=12=223 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.`
	CROSSREFS	`Cf. A000040, A002808.` `Sequence in context: A159482 A033932 A144186 this_sequence A126992 A028316 A019163` `Adjacent sequences: A153976 A153977 A153978 this_sequence A153980 A153981 A153982`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 04 2009`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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