1,1

Table of n, a(n) for n=1..89.

a(4) = 2 as 2= prime(1) followed by prime(1+4) is prime.

Cf. A089782.

Sequence in context: A109747 A105612 A141744 * A302939 A090414 A068227

Adjacent sequences: A089780 A089781 A089782 * A089784 A089785 A089786

base,nonn

Amarnath Murthy, Nov 24 2003

More terms from David Wasserman, Oct 13 2005

approved