The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A141234 Sequence of k such that starting with P(0)=11 then k(n)*P(n-1)*(k(n)*P(n-1)-1)-1 is the least prime = P(n). 2
 1, 5, 3, 11, 74, 93, 139, 511, 641, 1166 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE 1*11*(1*11-1)-1=109 is a prime so k(1)=1 P(1)=109. PROG (PARI) P=11; for(i=1, 20, k=0; while(!ispseudoprime(t=k++*P*(k*P-1)-1), ); P=t; print1(k", ")) \\ Michel Marcus, Sep 16 2019 ; after A141240 CROSSREFS Cf. A141233, A141235, A141236, A141237, A141238, A141239, A141240. Sequence in context: A165670 A221869 A237116 * A130180 A245288 A104587 Adjacent sequences:  A141231 A141232 A141233 * A141235 A141236 A141237 KEYWORD nonn,more AUTHOR Pierre CAMI, Jun 16 2008 EXTENSIONS a(9) from Michel Marcus, Sep 17 2019 a(10) from Jinyuan Wang, Sep 17 2019 STATUS approved

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

Last modified April 21 14:38 EDT 2021. Contains 343154 sequences. (Running on oeis4.)