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 A034777 #20 Jan 10 2025 04:35:30
%S A034777 1,-23,253,-1495,4831,-5819,-16743,82985,-113390,-111113,534613,
%T A034777 -378235,-577737,385089,1222243,1070121,-6905933,2607970,10661421,
%U A034777 -7222345,-4235979,-12296099,18643273,20995205,-25494394,13287951
%N A034777 Dirichlet convolution of [ 1,1,1,... ] with Ramanujan numbers (A000594).
%C A034777 Multiplicative because both A000012 and A000594 are. - _Christian G. Bower_, May 16 2005
%C A034777 Inverse Moebius transform of A000594. - _Amiram Eldar_, Jan 10 2025
%H A034777 G. C. Greubel, <a href="/A034777/b034777.txt">Table of n, a(n) for n = 1..10000</a>
%t A034777 Table[DivisorSum[k, RamanujanTau], {k, 50}] (* _Jan Mangaldan_, Mar 15 2013 *)
%o A034777 (PARI) a(n) = sumdiv(n, d, ramanujantau(d)); \\ _Amiram Eldar_, Jan 10 2025
%Y A034777 Cf. A000594.
%K A034777 sign,mult
%O A034777 1,2
%A A034777 _N. J. A. Sloane_