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A134702 Initial prime, greater than 5, of a prime chain of length n under the iteration x->2x-5. 1
7, 11, 11, 11, 11, 11, 11, 11, 29614931, 29614931, 1172182334669, 67667595358511, 124204021800149 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

a(3) = 11 because 11 11*2-5=17 and 17*2-5=29 are primes.

CROSSREFS

Cf. A084954.

Sequence in context: A133891 A071631 A054510 * A053674 A205679 A166980

Adjacent sequences:  A134699 A134700 A134701 * A134703 A134704 A134705

KEYWORD

nonn,more

AUTHOR

Don Reble, Nov 07 2007

STATUS

approved

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Last modified April 24 04:23 EDT 2019. Contains 322406 sequences. (Running on oeis4.)