OFFSET
1,1
LINKS
Donovan Johnson, Table of n, a(n) for n = 1..1000
EXAMPLE
Invphi(1048576*211)={221249537,442499074}, a(47)=2. Observe that a(15)=0 because 47 needs a very large 2^i multiplier (instead of 1048576) to give a nonempty InvPhi set.
MAPLE
>[seq(nops(invphi(1048576*ithprime(i))), i=1..128)];
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, May 30 2002
STATUS
approved