A085893 Group the natural numbers such that the product of the n-th group has n prime divisors. (1), (2), (3,4), (5,6,),(7,8,9,10),(11,12,13,14),(15,16,17,18,19,20,21),... Sequence contains the number of terms in the groups.

1, 1, 2, 2, 4, 4, 7, 7, 7, 8, 10, 12, 11, 13, 14, 15, 19, 16, 19, 18, 21, 19, 24, 24, 24, 26, 27, 28, 29, 31, 29, 33, 33, 35, 37, 37, 38, 38, 41, 39, 45, 44, 45, 44, 49, 47, 52, 48, 52, 52, 56, 52, 53, 60, 59, 58, 59, 65, 64, 61, 65, 63, 70, 70, 70, 68, 73, 75, 71, 76, 75, 79, 78

Offset

0,3

Links

Table of n, a(n) for n=0..72.

Crossrefs

Cf. A085892, A085894.

Sequence in context: A338333 A287144 A348543 * A341950 A230167 A060028

Adjacent sequences: A085890 A085891 A085892 * A085894 A085895 A085896

Keyword

nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 10 2003

Extensions

More terms from Ray Chandler, Sep 13 2003

Status

approved