id:A133133 - OEIS Search Results

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a(n) = largest prime factor of sum of largest prime factors of numbers from 2 to n.

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2, 5, 7, 3, 5, 11, 3, 3, 2, 43, 23, 59, 11, 71, 73, 5, 31, 7, 13, 31, 5, 79, 23, 83, 179, 13, 7, 109, 223, 127, 2, 89, 71, 97, 7, 331, 7, 11, 23, 409, 13, 17, 47, 19, 83, 109, 137, 37, 7, 577, 59, 643, 19, 73, 83, 683, 89, 257, 97, 31, 31, 7, 877, 89, 53, 11, 197, 7, 29, 181, 11 (list; graph; listen)

	OFFSET	`2,1`
	EXAMPLE	`a(11) = gpf(43)=43, a(12) = gpf(46)=23`
	CROSSREFS	`Cf. A088822.` `Sequence in context: A095795 A088531 A097964 this_sequence A024710 A140264 A140263` `Adjacent sequences: A133130 A133131 A133132 this_sequence A133134 A133135 A133136`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Finley (pfinley(AT)touro.edu), Sep 21 2007`

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Last modified December 4 15:51 EST 2008. Contains 151308 sequences.

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