OFFSET
1,2
COMMENTS
pod(n) is the product of the divisors of n (A007955).
FORMULA
a(n) = Sum_{i=1..n} A266265(i).
MATHEMATICA
Accumulate@ Array[Product[Times @@ Divisors@ d, {d, Divisors@ #}] &, 28] (* Michael De Vlieger, Dec 26 2016 *)
PROG
(Magma) [&+[&*[&*[b: b in Divisors(d)]: d in Divisors(k)]: k in [1..n]]: n in [1..1000]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Dec 26 2016
STATUS
approved