A141239 Sequence of k such that starting with P(0) = 29 then k(n)*P(n-1)*(k(n)*P(n-1)-1)-1 is the least prime = P(n).

1, 2, 16, 3, 9, 11, 136, 219, 51, 1428

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Example

1*29*(1*29-1)-1 = 811 (prime) so k(1) = 1, P(1) = 811.

Prog

(PARI) P=29; 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

Cf. A141233-A141240.

Sequence in context: A145684 A254637 A197226 * A303990 A095860 A070654

Adjacent sequences: A141236 A141237 A141238 * A141240 A141241 A141242

Keyword

nonn

Author

Pierre CAMI, Jun 16 2008

Extensions

a(10) from Charles R Greathouse IV, Dec 27 2011

Status

approved