A247511 Number of preprimes of the third kind (A247394) with the smallest prime divisor equals prime(n).

12, 12, 3, 4, 2, 3, 4, 1, 4, 1, 1, 2, 3, 4, 1, 4, 2, 1, 2, 2, 4, 5, 0, 0, 1, 0, 0, 5, 3, 2, 2, 5, 1, 2, 2, 2, 2, 2, 1, 4, 0, 1, 0, 4, 6, 2, 0, 2, 2, 1, 4, 2, 3, 3, 1, 2, 1, 1, 2, 5, 1, 1, 0, 4, 2, 4, 1, 1, 1, 3, 2, 2, 1, 2, 2, 1, 2, 3, 1, 3, 0, 2, 1, 3, 3, 1

Offset

1,1

Links

Table of n, a(n) for n=1..86.

Vladimir Shevelev, A classification of the positive integers over primes

Crossrefs

Cf. A000040, A156759, A247393, A247394, A247509, A247510, A247606.

Sequence in context: A155825 A125509 A281251 * A374989 A097824 A133208

Adjacent sequences: A247508 A247509 A247510 * A247512 A247513 A247514

Keyword

nonn

Author

Vladimir Shevelev, Sep 18 2014

Extensions

More terms from Peter J. C. Moses, Sep 18 2014

Status

approved