1,3

As in A064553 primes occur in A064558 in natural order but are far less dense.

Table of n, a(n) for n=1..105.

Cf. A064558, A000720, A064557, A064600.

Sequence in context: A235123 A242768 A064557 * A023967 A278163 A260999

Adjacent sequences: A064598 A064599 A064600 * A064602 A064603 A064604

nonn

Reinhard Zumkeller, Sep 22 2001

approved