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A064041 Number of divisors of A064040(n). 1
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 (list; graph; refs; listen; history; text; internal format)
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 * A241656 A275161 A077553

Adjacent sequences:  A064038 A064039 A064040 * A064042 A064043 A064044

KEYWORD

nonn

AUTHOR

Lior Manor, Aug 23 2001

STATUS

approved

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Last modified July 14 10:07 EDT 2020. Contains 335721 sequences. (Running on oeis4.)