OFFSET
1,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..387
MATHEMATICA
a[n_] := Sum[MoebiusMu[k] * n^(n-k), {k, 1, n}]; Array[a, 20] (* Amiram Eldar, May 19 2021 *)
PROG
(PARI) a(n) = sum(k=1, n, moebius(k)*n^(n-k));
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, May 19 2021
STATUS
approved