OFFSET
1,1
EXAMPLE
1*19*(1*19-1)-1=341 composite
2*19*(2*19-1)-1=1405 composite
3*19*(3*19-1)-1=3191 prime so k(1)=3 P(1)=3191
PROG
(PARI) P=19; for(i=1, 20, k=0; while(!ispseudoprime(t=k++*P*(k*P-1)-1), ); P=t; print1(k", ")) \\ Charles R Greathouse IV, Dec 27 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
Pierre CAMI, Jun 16 2008
EXTENSIONS
a(9)-a(10) from Charles R Greathouse IV, Dec 27 2011
STATUS
approved