A081166 Number of distinct primes dividing A060114(n).

0, 0, 1, 2, 2, 3, 3, 3, 4, 5, 6, 12, 16, 20, 31, 50, 70, 106, 143

Offset

0,4

Links

Table of n, a(n) for n=0..18.

Formula

a(n) = A001221(A060114(n)).

Crossrefs

Cf. A001221, A060114, A081165.

Sequence in context: A227398 A003105 A240856 * A376695 A173910 A036846

Adjacent sequences: A081163 A081164 A081165 * A081167 A081168 A081169

Keyword

nonn,more

Author

Antti Karttunen and Wouter Meeussen, Mar 10 2003

Status

approved