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 A280086 #9 Sep 08 2022 08:46:18 %S A280086 1,3,12,252,1512,217728,1741824,548674560,28531077120,9244068986880, %T A280086 110928827842560,3130855237028413440,43831973318397788160, %U A280086 25247216631397125980160,14542396779684744564572160,142006504553621530673047142400,2556117081965187552114848563200 %N A280086 Partial products of A206032 (Product_{d|n} sigma(d)). %C A280086 sigma(n) is the sum of the divisors of n (A000203). %F A280086 a(n) = Product_{i=1..n} A206032(i). %t A280086 FoldList[Times[#1, #2] &, Array[Product[DivisorSigma[1, d], {d, Divisors@ #}] &, 17]] (* _Michael De Vlieger_, Dec 26 2016 *) %o A280086 (Magma) [&*[&*[SumOfDivisors(d): d in Divisors(k)]: k in [1..n]]: n in [1..100]] %Y A280086 Cf. A000203, A007429, A206032, A280078 (partial products of A007429), A280085 (partial sums of A206032). %K A280086 nonn %O A280086 1,2 %A A280086 _Jaroslav Krizek_, Dec 26 2016