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A048127 Becomes prime or 4 after exactly 5 iterations of f(x) = sum of prime factors of x. 1
62, 69, 74, 94, 106, 116, 123, 133, 169, 178, 188, 190, 201, 206, 228, 238, 244, 254, 259, 267, 286, 291, 292, 305, 321, 327, 340, 344, 365, 366, 370, 381, 387, 395, 403, 404, 408, 411, 413, 438, 444, 446, 453, 459, 465, 471, 472, 474, 482, 483, 484, 496 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

f(x) = sum of prime factors with multiplicity, so that f(1500) = 2+2+3+5+5+5 = 22.

LINKS

Table of n, a(n) for n=1..52.

CROSSREFS

Sequence in context: A095553 A024804 A025340 * A047823 A294738 A044997

Adjacent sequences:  A048124 A048125 A048126 * A048128 A048129 A048130

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 3 14:29 EDT 2021. Contains 346438 sequences. (Running on oeis4.)