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A048132 Becomes prime or 4 after exactly 10 iterations of f(x) = sum of prime factors of x. 1
9314, 27849, 30993, 36398, 46142, 46405, 55686, 68653, 69765, 74416, 74924, 83718, 84934, 86662, 86696, 90177, 92915, 97533, 97629, 99895, 101823, 106538, 111498, 116182, 116225, 119005, 119618, 119874, 122506, 124414, 124467, 129236 (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..32.

CROSSREFS

Sequence in context: A183832 A200952 A252205 * A241935 A229435 A022223

Adjacent sequences:  A048129 A048130 A048131 * A048133 A048134 A048135

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 19 16:39 EDT 2022. Contains 356229 sequences. (Running on oeis4.)