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.

A068103 Smallest prime starting with at least n 2s.

Original entry on oeis.org

2, 2, 223, 2221, 22229, 2222203, 22222223, 22222223, 222222227, 22222222223, 22222222223, 2222222222243, 22222222222201, 22222222222229, 222222222222227, 222222222222222043, 222222222222222221
Offset: 0

Views

Author

Amarnath Murthy, Feb 20 2002

Keywords

Crossrefs

Programs

  • PARI
    A068103(n)={n=10^n\9*2;n>2&for(d=1,9e9,n*=10;for(t=1,10^d-1,ispseudoprime(n+t)&return(n+t)));2} \\ - M. F. Hasler, Oct 17 2012

Extensions

More terms from Sascha Kurz, Mar 19 2002
Corrected by Don Reble, Jan 17 2007