A134702 Initial prime, greater than 5, of a prime chain of length n under the iteration x->2x-5.

7, 11, 11, 11, 11, 11, 11, 11, 29614931, 29614931, 1172182334669, 67667595358511, 124204021800149

Offset: 1

Author

Don Reble, Nov 07 2007

Keywords

• nonn
• more

Examples

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

Crossrefs

Cf. A084954.