A085083 Index of the first occurrence of n in A085082. Smallest number having divisors with n distinct prime signatures.

1, 2, 4, 8, 12, 32, 24, 128, 48, 120, 96, 144, 192, 360, 288, 480, 768, 576, 720, 2592, 1152, 1728, 2160, 1440, 3840, 3456, 4608, 7200, 2880, 4320, 15360, 15120, 10080, 5760, 20736, 36864, 8640, 27648, 11520, 20160, 50400, 30240, 25920, 17280, 82944

Offset: 1

Author

Amarnath Murthy, Jul 01 2003

Keywords

• nonn

Examples

			a(5) = 12 since the divisors of 12 are 1,2,3,4,6 and 12 and the five distinct prime signatures arising are 1, p, p*q, p^2 and p^2*q.
		

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000
• Index entries for sequences related to prime signature

Crossrefs

Cf. A085082.

Subsequence of A025487.

Extensions

More terms from David Wasserman, Jan 25 2005