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Partial sums of A175317 (Sum_{d|n} pod(d)).
2

%I #10 Sep 08 2022 08:46:18

%S 1,4,8,19,25,67,75,150,181,289,301,2079,2093,2299,2533,3632,3650,9551,

%T 9571,17687,18139,18637,18661,352279,352410,353102,353862,376028,

%U 376058,1186430,1186462,1220329,1221433,1222609,1223847,11309180,11309218,11310684

%N Partial sums of A175317 (Sum_{d|n} pod(d)).

%C pod(n) is the product of the divisors of n (A007955).

%F a(n) = Sum_{i=1..n} A175317(i).

%t Accumulate@ Array[Sum[Times @@ Divisors@ d, {d, Divisors@ #}] &, 38] (* _Michael De Vlieger_, Dec 26 2016 *)

%o (Magma) [&+[&+[&*[b: b in Divisors(d)]: d in Divisors(k)]: k in [1..n]]: n in [1..1000]]

%Y Cf. A007955, A175317, A206032, A280085 (partial sums of A206032), A280115 (partial products of A175317).

%K nonn

%O 1,2

%A _Jaroslav Krizek_, Dec 26 2016