A185099 Indices k for which A185079(k) > k^2.

18, 21, 22, 24, 30, 36, 40, 48, 52, 56, 70, 80, 82, 85, 86, 90, 93, 94, 100, 102, 105, 115, 116, 118, 129, 132, 135, 165, 177, 180, 182, 183, 189, 201, 203, 205, 210, 213, 214, 216, 217, 224

Offset: 1

Author

Vladimir Shevelev, Feb 18 2011

Keywords

• nonn

Comments

For other k >= 2, except for 6, 60, 120, 360, 816, 6120, 8280, ..., we have A185079(k) < k^2. In particular, all terms of the sequence are composite numbers.

Conjecture: The sequence is infinite.

Links

• Amiram Eldar, Table of n, a(n) for n = 1..3000

Crossrefs

Cf. A185079.

Formula

Limit_{n->oo} a(n)/n^2 = 1.

Extensions

Corrected by R. J. Mathar, Feb 19 2011