1,2
a(n)=a(n-1)+gpf(a(n-1)) for n>1.
Cf. A080181.
Sequence in context: A048598 A049717 A047866 * A109900 A034828 A081276
Adjacent sequences: A080180 A080181 A080182 * A080184 A080185 A080186
nonn
Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 05 2003