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

1,1

Links

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

Example

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

Prog

(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

Crossrefs

Cf. A064040.

Sequence in context: A195781 A059656 A205373 * A365476 A241656 A275161

Adjacent sequences: A064038 A064039 A064040 * A064042 A064043 A064044

Keyword

nonn

Author

Lior Manor, Aug 23 2001

Status

approved