A124338 Largest prime < 10*a(n-1), a(1)=41.

41, 409, 4079, 40787, 407861, 4078609, 40786087, 407860853, 4078608529, 40786085251, 407860852417, 4078608524153, 40786085241529, 407860852415231, 4078608524152277, 40786085241522707, 407860852415227039, 4078608524152270349, 40786085241522703351, 407860852415227033453

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]&, 41, 30] (* Vincenzo Librandi, Jun 28 2014 *)