OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = n * A062949(n).
Multiplicative with a(p^e) = ((e+1)*p^(2*e+1) - (e+2)*p^(2*e) + p^e)/(p-1). - Amiram Eldar, Aug 31 2023
EXAMPLE
a(5) = 45 = 5 * A062949(5) = 5 * 9.
MAPLE
seq(A127469(n), n=1..80) ; # R. J. Mathar, Feb 09 2011
MATHEMATICA
f[p_, e_] := ((e+1)*p^(e+1)-(e+2)*p^e+1)/(p-1); a[1] = 1; a[n_] := n * Times @@ f @@@ FactorInteger[n]; Array[a, 60] (* Amiram Eldar, Aug 31 2023 *)
KEYWORD
nonn,easy,mult
AUTHOR
Gary W. Adamson, Jan 15 2007
EXTENSIONS
More terms from Amiram Eldar, Aug 31 2023
STATUS
approved