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 A366772 #10 Feb 25 2024 02:17:28
%S A366772 1,1,4,6,12,32,44,108,260,384,684,2688,2732,5632,15936,27864,43692,
%T A366772 153920,174764,499968,953920,1477440,2796204,11708928,12253248,
%U A366772 22380544,69769600,115568640,181990200,620101632,715827884,1826150832,3880589184,5726797824
%N A366772 Sum of the divisors of A001045(n) (Jacobsthal numbers).
%H A366772 Amiram Eldar, <a href="/A366772/b366772.txt">Table of n, a(n) for n = 1..1122</a>
%F A366772 a(n) = sigma(Jacobsthal(n)) = A000203(A001045(n)).
%e A366772 a(9) = 260 because Jacobsthal(9) = 171 has divisors {1, 3, 9, 19, 57, 171}.
%Y A366772 Cf. A000203, A001045, A366769, A366770, A366771, A063477.
%K A366772 nonn
%O A366772 1,3
%A A366772 _Sean A. Irvine_, Oct 21 2023