A099592 Minimum index i of certain Lucas (or Lehmer) sequences such that every element with index >= i has a primitive divisor.

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

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