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

1,1

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

Links

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

Formula

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

Example

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

Crossrefs

Cf. A000961, A005179, A007416.

Sequence in context: A262945 A309674 A270516 * A187128 A255911 A091382

Adjacent sequences: A099315 A099316 A099317 * A099319 A099320 A099321

Keyword

nonn

Author

Reinhard Zumkeller, Oct 12 2004

Extensions

More terms from Amiram Eldar, Aug 31 2019

Status

approved