OFFSET
1,2
COMMENTS
For background references see A330570.
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = A331080(n) / 3. - Amiram Eldar, Apr 19 2024
MATHEMATICA
f[p_, e_] := (e+1)*(e+2)/2; s[1] = 1; s[n_] := Times @@ f @@@ FactorInteger[n]; With[{t = Array[s, 100]}, Accumulate[Most[t] * Rest[t]] / 3] (* Amiram Eldar, Apr 19 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 10 2020
STATUS
approved