A124335 Largest prime < 10*a(n-1), a(1)=31.

31, 307, 3067, 30661, 306589, 3065863, 30658619, 306586169, 3065861681, 30658616789, 306586167863, 3065861678629, 30658616786249, 306586167862427, 3065861678624219, 30658616786242157, 306586167862421549, 3065861678624215469, 30658616786242154603, 306586167862421546017

Offset: 1

Author

Artur Jasinski, Dec 16 2006

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..200

Crossrefs

Cf. A124262.

Programs

Mathematica

NestList[NextPrime[10 #, -1]&, 31, 30] (* Vincenzo Librandi, Jun 28 2014 *)