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 A158033 #22 Feb 10 2020 07:16:54
%S A158033 1,3,10,73,3126,1686434,96889010408,9223376434903384065,
%T A158033 278128389443693527934467475898331,
%U A158033 10000000000000000277555756156289135105943945819724042094
%N A158033 a(n) = sigma_(Fibonacci(n)) (n).
%p A158033 a:= n-> numtheory[sigma][combinat[fibonacci](n)](n):
%p A158033 seq(a(n), n=1..10); # _Alois P. Heinz_, Feb 10 2020
%t A158033 Table[DivisorSigma[Fibonacci[n],n],{n,10}] (* _Harvey P. Dale_, Nov 24 2013 *)
%o A158033 (Sage) [sigma(n,fibonacci(n))for n in range(1,11)] # _Zerinvary Lajos_, Jun 04 2009
%o A158033 (PARI) a(n) = sigma(n, fibonacci(n)); \\ _Michel Marcus_, Feb 09 2020
%Y A158033 Cf. A000045, A000203, A001157, A001158, A001160, A013956, A013961, A013969.
%K A158033 nonn
%O A158033 1,2
%A A158033 _Vladimir Joseph Stephan Orlovsky_, Mar 11 2009
%E A158033 Name edited by _Michel Marcus_, Feb 09 2020