another duplicate: A064435 and A020488
Lambert Klasen
Lambert.Klasen at gmx.net
Fri Jun 17 20:46:18 CEST 2005
Dear seqfans,
A064435 and A020488
http://www.research.att.com/projects/OEIS?Anum=A064435
http://www.research.att.com/projects/OEIS?Anum=A020488
seem to be the same.
Numbers n such that tau[n]=sigma[k-1,n]=Phi[n]^k=Phi[n]; k=1
and
Numbers n such that sigma_0(n) = phi(n).
with both sequences: 1,3,8,10,18,24,30
while the first states:
"Believed to be finite and full"
the latter has flags
"nonn,fini,full"
i "believe" the flags, but still i'd like to know the reason.
any hint ?
best regards
Lambert
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