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

Offset

1,1

Links

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

Mathematica

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

Crossrefs

Cf. A006902, A040016, A120031-A120041.

Sequence in context: A076458 A299551 A362537 * A289422 A157688 A155658

Adjacent sequences: A124296 A124297 A124298 * A124300 A124301 A124302

Keyword

nonn

Author

Artur Jasinski, Dec 16 2006

Status

approved