1,1

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

Table of n, a(n) for n=1..32.

Sequence in context: A183832 A200952 A252205 * A241935 A229435 A022223

Adjacent sequences: A048129 A048130 A048131 * A048133 A048134 A048135

nonn

David W. Wilson

approved