A062502 - OEIS

A062502

Number of prime divisors (with repetition) of the nonprimes (including 1).

0, 2, 2, 3, 2, 2, 3, 2, 2, 4, 3, 3, 2, 2, 4, 2, 2, 3, 3, 3, 5, 2, 2, 2, 4, 2, 2, 4, 3, 3, 3, 2, 5, 2, 3, 2, 3, 4, 2, 4, 2, 2, 4, 2, 3, 6, 2, 3, 3, 2, 3, 5, 2, 3, 3, 2, 3, 5, 4, 2, 4, 2, 2, 2, 4, 4, 2, 3, 2, 2, 2, 6, 3, 3, 4, 3, 4, 3, 2, 5, 3, 2, 5, 3, 2, 3, 3, 2, 2, 5, 2, 2, 2, 3, 3, 4, 7, 2, 3, 4, 2, 2, 4, 4, 3

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A001222(A018252(n)). - Sean A. Irvine, Mar 31 2023

MAPLE

f:= proc(n) if not isprime(n) then numtheory:-bigomega(n) fi end proc:

map(f, [$1..200]); # Robert Israel, Oct 01 2020

MATHEMATICA

PrimeOmega/@Complement[Range[200], Prime[Range[PrimePi[200]]]] (* Harvey P. Dale, Apr 22 2011 *)