OFFSET
1,6
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
EXAMPLE
a(6) = 2 since there are 2 solutions to psi(x) = 6: 4 and 5.
MATHEMATICA
psi[1] = 1; psi[n_] := n * Times @@ (1 + 1/Transpose[FactorInteger[n]][[1]]); m = 100; v = Table[0, {m}]; Do[i = psi[k]; If[i <= m, v[[i]]++], {k, 1, m}]; v
CROSSREFS
KEYWORD
nonn
AUTHOR
Amiram Eldar, Feb 05 2020
STATUS
approved