A048132 - OEIS

A048132

Becomes prime or 4 after exactly 10 iterations of f(x) = sum of prime factors of x.

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

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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