A085083 - OEIS

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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

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OFFSET

1,2

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

Index entries for sequences related to prime signature

EXAMPLE

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.

CROSSREFS

Cf. A085082.

Subsequence of A025487.

Sequence in context: A364768 A204088 A187941 * A076745 A007374 A105207

Adjacent sequences: A085080 A085081 A085082 * A085084 A085085 A085086

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Jul 01 2003

EXTENSIONS

More terms from David Wasserman, Jan 25 2005

STATUS

approved