A134701 Initial prime, greater than 3, of a prime chain of length n under the iteration x->2x-3.

5, 5, 5, 5, 13, 283, 283, 1823, 443119823, 35332754383, 57704757113, 69478435945493, 2235755385712423

Offset

1,1

Links

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

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: A003870 A304681 A076407 * A291655 A078097 A285243

Adjacent sequences: A134698 A134699 A134700 * A134702 A134703 A134704

Keyword

nonn,more

Author

Don Reble, Nov 07 2007

Status

approved