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 A366710 #7 Jan 04 2024 13:59:13
%S A366710 12,168,1896,30240,271464,4247040,39156480,636854400,5817876000,
%T A366710 72749094432,852203639280,15743437516800,116720110574544,
%U A366710 1518251476008960,17220536137159296,292933954031846400,2420303924088730368,38936041113123840000,348523635677043192936
%N A366710 Sum of the divisors of 12^n-1.
%H A366710 Max Alekseyev, <a href="/A366710/b366710.txt">Table of n, a(n) for n = 1..310</a>
%F A366710 a(n) = sigma(12^n-1) = A000203(A024140(n)).
%e A366710 a(3)=1896 because 12^3-1 has divisors {1, 11, 157, 1727}.
%p A366710 a:=n->numtheory[sigma](12^n-1):
%p A366710 seq(a(n), n=1..100);
%t A366710 DivisorSigma[1, 12^Range[30]-1]
%Y A366710 Cf. A024140, A000203, A366707, A366708, A366709, A366711, A366684.
%K A366710 nonn
%O A366710 1,1
%A A366710 _Sean A. Irvine_, Oct 17 2023