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A134701 Initial prime, greater than 3, of a prime chain of length n under the iteration x->2x-3. 1
5, 5, 5, 5, 13, 283, 283, 1823, 443119823, 35332754383, 57704757113, 69478435945493, 2235755385712423 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

a(3) = 5 because 5, 5*2-3=7, 7*2-3=11 and 11*2-3=19 are primes.

CROSSREFS

Cf. A084954.

Sequence in context: A071577 A003870 A076407 * A078097 A082476 A024729

Adjacent sequences:  A134698 A134699 A134700 * A134702 A134703 A134704

KEYWORD

nonn,more

AUTHOR

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

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Last modified February 15 05:45 EST 2012. Contains 205694 sequences.