1,2

a(n) is multiplicative and for an odd prime power p^k : a(p^k) = 2 + p^(k-1)(p+1).

a(n) = A066947(n) + 1

Cf. A066947, A060594.

Sequence in context: A075381 A030572 A094320 this_sequence A130439 A033690 A103779

Adjacent sequences: A066904 A066905 A066906 this_sequence A066908 A066909 A066910

nonn,mult

Sharon Sela (sharonsela(AT)hotmail.com), Jan 26 2002