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Search: id:A047829
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A047829 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)

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


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