This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A280078 #11 Sep 08 2022 08:46:18
%S A280078 1,4,20,220,1540,30800,277200,7207200,129729600,3632428800,
%T A280078 47221574400,2597186592000,38957798880000,1402480759680000,
%U A280078 49086826588800000,2797949115561600000,53161033195670400000,3827594390088268800000,80379482191853644800000
%N A280078 Partial products of A007429 (Sum_{d|n} sigma(d)).
%C A280078 sigma(n) is the sum of the divisors of n (A000203).
%F A280078 a(n) = Product_{i=1..n} A007429(i).
%o A280078 (Magma) [&*[&+[SumOfDivisors(d): d in Divisors(k)]: k in [1..n]]: n in [1..100]]
%Y A280078 Cf. A000203, A280075 (partial products of A211776), A280077 (partial sums of A007429).
%K A280078 nonn
%O A280078 1,2
%A A280078 _Jaroslav Krizek_, Dec 25 2016