1,1

A048974, A052147, A067187 and A088685 are very similar after dropping terms less than 13. - Eric W. Weisstein, Oct 10 2003

Table of n, a(n) for n=1..54.

One of the primes must be 2, so this is simply the odd primes + 2.

Cf. A014092.

Sequence in context: A128161 A141106 A047478 * A089193 A302482 A284742

Adjacent sequences: A048971 A048972 A048973 * A048975 A048976 A048977

nonn,easy

N. J. A. Sloane

approved