A280116 Partial sums of A266265 (Product_{d|n} pod(d)).
1, 3, 6, 22, 27, 243, 250, 1274, 1355, 2355, 2366, 2988350, 2988363, 2991107, 2994482, 4043058, 4043075, 38055299, 38055318, 102055318, 102064579, 102075227, 102075250, 63403483040626, 63403483041251, 63403483058827, 63403483117876, 63403965008180
Offset: 1
Keywords
Crossrefs
Programs
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Magma
[&+[&*[&*[b: b in Divisors(d)]: d in Divisors(k)]: k in [1..n]]: n in [1..1000]];
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Mathematica
Accumulate@ Array[Product[Times @@ Divisors@ d, {d, Divisors@ #}] &, 28] (* Michael De Vlieger, Dec 26 2016 *)
Formula
a(n) = Sum_{i=1..n} A266265(i).
Comments