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A134702 Initial prime, greater than 5, of a prime chain of length n under the iteration x->2x-5. +0
2
7, 11, 11, 11, 11, 11, 11, 11, 29614931, 29614931, 1172182334669, 67667595358511, 124204021800149 (list; graph; listen)
OFFSET

1,1

EXAMPLE

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

CROSSREFS

Cf. A084954.

Adjacent sequences: A134699 A134700 A134701 this_sequence A134703 A134704 A134705

Sequence in context: A133891 A071631 A054510 this_sequence A053674 A117610 A084451

KEYWORD

nonn,more

AUTHOR

Don Reble (djr(AT)nk.ca), Nov 07 2007

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Last modified October 16 00:31 EDT 2008. Contains 145098 sequences.


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