A099318 Smallest k>1 such that k*(n-th minimal number) is also a minimal number.

2, 2, 3, 2, 2, 3, 2, 4, 3, 2, 3, 2, 4, 2, 3, 3, 2, 5, 4, 2, 4, 3, 3, 2, 4, 3, 2, 5, 3, 4, 3, 2, 5, 4, 4, 3, 2, 4, 2, 3, 7, 3, 3, 3, 2, 5, 2, 4, 5, 4, 4, 4, 5, 2, 2, 3, 3, 3, 4, 2, 7, 3, 2, 7, 2, 2, 5, 5, 3, 3, 4, 4, 5, 3, 2, 3, 5, 2, 2, 4, 3, 4, 2, 4, 3, 4, 2

Offset: 1

Author

Reinhard Zumkeller, Oct 12 2004

Keywords

• nonn

Comments

A minimal number is the smallest number with a given number of divisors, see A007416.

Is a(n) in A000961? - David A. Corneth, Aug 31 2019

Examples

			A007416(38) = A005179(64) = 7560 = 2^3*3^3*5*7;
		

Links

• David A. Corneth, Table of n, a(n) for n = 1..10000 (first 844 terms from Amiram Eldar)

Crossrefs

Cf. A000961, A005179, A007416.

Formula

a(n)*A007416(n) = A007416(m) for some m.

Extensions

More terms from Amiram Eldar, Aug 31 2019