1,2

All divisors >1 of the terms are also in the sequence. All primes in the sequence are of form p^F(0)*q^F(1) iff p^0=1.

Table of n, a(n) for n=1..70.

a(1) = 1 because 2^0*3^0 = 1;

a(3) = 3 because 3^1*5^0 = 3;

a(4) = 4 because 2^2*3^0 = 4;

a(6) = 6 because 2^1*3^1 = 6.

Cf. A115063.

Sequence in context: A023809 A046100 A023757 * A121176 A028261 A119675

Adjacent sequences: A115102 A115103 A115104 * A115106 A115107 A115108

nonn

Giovanni Teofilatto, Mar 03 2006; corrected Mar 04 2006

approved