id:A047829 - OEIS Search Results

Search: id:A047829

Displaying 1-1 of 1 results found.

page 1

Becomes prime after exactly 10 iterations of f(x) = sum of prime factors of x.

+0
1

167073, 212438, 424876, 480226, 492494, 501219, 567614, 595942, 656714, 668319, 670465, 688958, 723853, 738662, 743973, 768817, 791842, 804558, 849752, 849818, 864074, 887613, 888542, 960452, 975662, 984988, 1012786, 1037845, 1048574 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`f(x) = sum of prime factors without multiplicity, so that f(1500) = 2+3+5 = 10.`
	CROSSREFS	`Sequence in context: A110072 A034603 A061741 this_sequence A140941 A151618 A156426` `Adjacent sequences: A047826 A047827 A047828 this_sequence A047830 A047831 A047832`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research