cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A093168 Primes of the form 30*R_k + 7, where R_k is the repunit (A002275) of length k.

Original entry on oeis.org

7, 37, 337, 333337, 3333333333333333333333333333333333333333333337
Offset: 1

Views

Author

Rick L. Shepherd, Mar 26 2004

Keywords

Comments

Primes of the form (3*10^k + 33)/9. - Vincenzo Librandi, Nov 16 2010

Crossrefs

Cf. A056680 (corresponding k), A099411, A173766.