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A071634
Number of terms in the set InvPhi(1048576*p(n)), where p(n) is the n-th prime.
7
23, 112, 81, 64, 75, 48, 36, 28, 43, 68, 14, 80, 35, 50, 0, 43, 28, 28, 46, 52, 44, 32, 38, 49, 48, 37, 10, 34, 24, 47, 34, 65, 19, 28, 59, 20, 32, 82, 15, 30, 61, 32, 48, 62, 10, 32, 2, 26, 18, 16, 65, 77, 0, 46, 8, 0, 43, 18, 56, 60, 0, 38, 40, 13, 36, 26, 44, 46, 41, 12, 0
OFFSET
1,1
LINKS
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)];
KEYWORD
nonn
AUTHOR
Labos Elemer, May 30 2002
STATUS
approved