A064041 Number of divisors of A064040(n).

4, 4, 6, 4, 4, 6, 6, 4, 4, 8, 4, 6, 8, 4, 4, 4, 9, 4, 4, 8, 8, 6, 6, 4, 10, 6, 4, 6, 8, 4, 8, 4, 4, 12, 4, 6, 4, 8, 6, 4, 8, 12, 4, 6, 6, 4, 8, 10, 4, 12, 4, 4, 4, 8, 12, 4, 6, 4, 4, 4, 12, 6, 6, 9, 8, 8, 8, 4, 12, 8, 4, 10, 8, 4, 6, 6, 4, 4, 16, 4, 4, 6, 12, 4, 8, 12, 4, 4, 8, 8, 8, 12, 4, 4, 4, 15, 4

Offset: 1

Author

Lior Manor, Aug 23 2001

Keywords

• nonn

Examples

			a(17) = 9 since 36 is the 17th number with prime number of prime divisors and 36 is divisible by 9 numbers.
		

Links

• Harry J. Smith, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A064040.

Programs

PARI

{ n=0; for (m=1, 10^9, if (isprime(omega(m)), write("b064041.txt", n++, " ", numdiv(m)); if (n==1000, break)) ) } \\ Harry J. Smith, Sep 06 2009