A137800 Consider the first run of composites that contains at least two numbers whose largest prime factor is prime(n), n >= 2. a(n) is the second of these numbers.

27, 125, 147, 539, 2197, 2992, 3249, 50255, 11774, 15717, 62271, 265680, 172000, 34122, 1133458, 2313744, 1060851, 332387, 1334232, 404931, 1388583, 1357299, 15800793, 5516390, 66896138, 11962935, 6085090, 129761884, 43216624, 90972640

Offset: 2

Author

Enoch Haga, Feb 11 2008

Keywords

• nonn

Comments

For comments, examples and programs see sequence A137799, which gives the first of these numbers.

Crossrefs

Cf. A137799.

Extensions

Edited and a(18) through a(31) added by Klaus Brockhaus, Feb 15 2008