OFFSET
1,2
COMMENTS
Multiplicative because A332844 is.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..16384
PROG
(PARI)
up_to = 16384;
DirInverseCorrect(v) = { my(u=vector(#v)); u[1] = (1/v[1]); for(n=2, #v, u[n] = (-u[1]*sumdiv(n, d, if(d<n, v[n/d]*u[d], 0)))); (u) }; \\ Compute the Dirichlet inverse of the sequence given in input vector v.
A332844(n) = sumdiv(n, d, issquare(n/d) * sigma(d));
v347090 = DirInverseCorrect(vector(up_to, n, A332844(n)));
A347090(n) = v347090[n];
CROSSREFS
KEYWORD
AUTHOR
Antti Karttunen, Aug 18 2021
STATUS
approved