1,1

a(n) = A073395(a(n)).

a(4) is larger than 3500000, if it exists - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 27 2007

A073395(150) = A073395(2*3*5*5) = A008472(2*3*5*5)*A001414(2*3*5*5) = (2+3+5)*(2+3+5+5) = 10*15 = 150, therefore 150 is a term.

Cf. A008472, A001414.

Sequence in context: A032610 A067650 A123963 this_sequence A101857 A166595 A064803

Adjacent sequences: A073393 A073394 A073395 this_sequence A073397 A073398 A073399

nonn,more,bref

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 30 2002