OFFSET
1,2
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
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