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A141236 Sequence of k such that starting with P(0)=17 then k(n)*P(n-1)*(k(n)*P(n-1)-1)-1 is the least prime = P(n). 3
1, 2, 22, 9, 12, 140, 76, 1376, 49, 1030 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

EXAMPLE

1*17*(1*17-1)-1=271 prime so k(1)=1 P(1)=271

PROG

(PARI) P=17; 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: A083764 A336324 A335886 * A079032 A325485 A284063

Adjacent sequences:  A141233 A141234 A141235 * A141237 A141238 A141239

KEYWORD

nonn

AUTHOR

Pierre CAMI, Jun 16 2008

EXTENSIONS

a(9)-a(10) from Charles R Greathouse IV, Dec 27 2011

STATUS

approved

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Last modified August 13 05:18 EDT 2022. Contains 356077 sequences. (Running on oeis4.)