OFFSET
1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
Jean-Marie De Koninck and William Verreault, On the tower factorization of integers, arXiv:2308.09149 [math.NT], 2023. See page 2.
FORMULA
MATHEMATICA
f[p_, e_] := MoebiusMu[e]^2; a[1] = 1; a[n_] := Times @@ f @@@ FactorInteger[n]; Array[a, 100]
PROG
(PARI) a(n) = vecprod(apply(x -> moebius(x)^2, factor(n)[, 2]));
CROSSREFS
KEYWORD
nonn,easy,mult
AUTHOR
Amiram Eldar, Feb 23 2024
STATUS
approved