A124299 Largest prime < 10*a(n-1), a(1)=17.

17, 167, 1669, 16673, 166723, 1667227, 16672267, 166722667, 1667226667, 16672266659, 166722666527, 1667226665213, 16672266652081, 166722666520801, 1667226665207989, 16672266652079879, 166722666520798747, 1667226665207987467, 16672266652079874607, 166722666520798746053

Offset: 1

Author

Artur Jasinski, Dec 16 2006

Keywords

• nonn

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..300

Crossrefs

Cf. A124262.

Programs

Mathematica

NestList[NextPrime[10#,-1]&,17,20] (* Harvey P. Dale, Sep 05 2013 *)