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A141237
Sequence of k such that starting with P(0)=19 then k(n)*P(n-1)*(k(n)*P(n-1)-1)-1 is the least prime = P(n).
3
3, 1, 9, 14, 123, 39, 39, 549, 96, 701
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