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 A366783 #10 Oct 23 2023 05:22:09
%S A366783 1,1,3,7,8,14,60,84,121,150,414,1560,1352,2304,7239,12480,10713,22400,
%T A366783 67032,154056,166560,334880,770160,1322090,2020564,3712800,8461404,
%U A366783 21427200,17008752,37733696,154277568,219104032,249664896,341958960,1575703584,1997069256
%N A366783 Sum of the divisors of A000073(n) (tribonacci numbers).
%H A366783 Amiram Eldar, <a href="/A366783/b366783.txt">Table of n, a(n) for n = 2..365</a>
%F A366783 a(n) = A000203(A000073(n)).
%e A366783 a(8)=60 because the 8th tribonacci number 24 has divisors {1, 2, 3, 4, 6, 8, 12, 24}.
%t A366783 DivisorSigma[1, LinearRecurrence[{1, 1, 1}, {1, 1, 2}, 36]] (* _Amiram Eldar_, Oct 23 2023 *)
%Y A366783 Cf. A000203, A000073, A366780, A366781, A366782, A063477.
%K A366783 nonn
%O A366783 2,3
%A A366783 _Sean A. Irvine_, Oct 22 2023