The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A088605 a(n) is the beginning of the first set of n consecutive primes such that the concatenation of n with each of these primes is also prime. 0
 3, 23, 7, 720901, 956759, 41, 4769888443 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(8) > 10^11, a(9) = 11408039. - Hans Havermann, Sep 16 2005 LINKS EXAMPLE a(3) = 7 because 7, 11 and 13 are 3 consecutive primes and 37, 311 and 313 are all prime. MATHEMATICA < #&, l]; l = ToExpression /@ l; l = Select[l, PrimeQ]]; Print[Prime[s]], {n, 1, 30}]; (* Ryan Propper, Aug 14 2005 *) CROSSREFS Sequence in context: A196086 A196083 A285098 * A272816 A063562 A130475 Adjacent sequences: A088602 A088603 A088604 * A088606 A088607 A088608 KEYWORD base,hard,nonn AUTHOR Amarnath Murthy, Oct 15 2003 EXTENSIONS Corrected, extended and edited by Ryan Propper and David Wasserman, Aug 14 2005 a(7) from Hans Havermann, Sep 16 2005 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 27 20:39 EDT 2023. Contains 361575 sequences. (Running on oeis4.)