A124336 Largest prime < 10*a(n-1), a(1)=23.

23, 229, 2287, 22861, 228601, 2285981, 22859783, 228597829, 2285978263, 22859782619, 228597826159, 2285978261587, 22859782615849, 228597826158469, 2285978261584687, 22859782615846861, 228597826158468593, 2285978261584685869, 22859782615846858687, 228597826158468586843

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] &, 23, 30] (* Vincenzo Librandi, Jun 28 2014 *)