1,3

Joerg Arndt, Table of n, a(n) for n = 1..19999

Eric Weisstein's World of Mathematics, Highly Composite Number

a(n) = A001222(A002182(n)).

A002182(8) = 48 = 2^4*3, which has 5 prime factors, counted with multiplicity, so a(8)=5.

Cf. A002182, A002183, A108602, A112779, A112780, A112781.

Sequence in context: A141525 A209764 A071475 * A080594 A207291 A194175

Adjacent sequences: A112775 A112776 A112777 * A112779 A112780 A112781

nonn

Ray Chandler, Nov 11 2005

approved