1,2

Note that except 1, all other term in the sequence will be primes.

a(4)=7 is a term because 7 divides the 7th semiprime (i.e. 21).

Cf. A001358.

Sequence in context: A056354 A072534 A056292 this_sequence A073609 A053781 A066749

Adjacent sequences: A106122 A106123 A106124 this_sequence A106126 A106127 A106128

easy,nonn

Shyam Sunder Gupta (guptass(AT)rediffmail.com), May 07 2005