id:A081758 - OEIS Search Results

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Sum of prime factors (with repetition) of sum of prime factors (with repetition) of n.

+0
3

2, 3, 4, 5, 5, 7, 5, 5, 7, 11, 7, 13, 6, 6, 6, 17, 6, 19, 6, 7, 13, 23, 6, 7, 8, 6, 11, 29, 7, 31, 7, 9, 19, 7, 7, 37, 10, 8, 11, 41, 7, 43, 8, 11, 10, 47, 11, 9, 7, 9, 17, 53, 11, 8, 13, 13, 31, 59, 7, 61, 14, 13, 7, 8, 8, 67, 10, 15, 9, 71, 7, 73, 16, 13, 23, 8, 8, 79, 13, 7, 43, 83, 9, 13, 11 (list; graph; listen)

	OFFSET	`2,1`
	COMMENT	`a(n) = A001414(A001414(n)). For further iterations see: A029908, A002217;` `a(n)=n iff n is prime or 4.`
	EXAMPLE	`18 = 233 -> 2+3+3 = 222 -> 2+2+2 = 6: a(18) = 6.`
	CROSSREFS	`Sequence in context: A051598 A086993 A029908 this_sequence A106492 A118503 A086295` `Adjacent sequences: A081755 A081756 A081757 this_sequence A081759 A081760 A081761`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 08 2003`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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