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A099592 Minimum index i of certain Lucas (or Lehmer) sequences such that every element with index >= i has a primitive divisor. 0
1260, 330, 210, 120, 90, 78, 66, 60, 60, 60, 42, 42, 42, 42, 42, 42, 42, 42, 42, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

For n>20, a(n) = 30.

LINKS

Table of n, a(n) for n=2..66.

P. M. Voutier, Primitive divisors of Lucas and Lehmer sequences, Journal de théorie des nombres de Bordeaux, Tome 8 (1996) no. 2 , p. 251-274.

CROSSREFS

Sequence in context: A211773 A215991 A288921 * A240922 A014575 A144563

Adjacent sequences:  A099589 A099590 A099591 * A099593 A099594 A099595

KEYWORD

nonn

AUTHOR

Ralf Stephan, Oct 26 2004

STATUS

approved

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Last modified April 15 10:49 EDT 2021. Contains 342977 sequences. (Running on oeis4.)