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 A034779 #20 Sep 20 2019 03:54:17 %S A034779 1,-47,505,-2415,9661,-23735,-33487,237201,-163277,-454067,1069225, %T A034779 -1219575,-1155475,1573889,4878805,323217,-13811867,7674019,21322841, %U A034779 -23331315,-16910935,-50253575,37286545,119786505 %N A034779 Dirichlet convolution of [ 1,1,1,... ] with A034778. %C A034779 Multiplicative because both A000012 and A034778 are. - _Christian G. Bower_, May 16 2005 %t A034779 b[n_] := DivisorSum[n, RamanujanTau[#] RamanujanTau[n/#]&]; %t A034779 a[n_] := DivisorSum[n, b]; %t A034779 a /@ Range[1, 24] (* _Jean-François Alcover_, Sep 20 2019 *) %o A034779 (PARI) seq(n)={my(v=Vec(eta(x + O(x^n))^24)); dirmul(dirmul(v,v), vector(#v,n,1))} \\ _Andrew Howroyd_, Feb 12 2018 %Y A034779 Cf. A000012, A034778. %K A034779 sign,mult %O A034779 1,2 %A A034779 _N. J. A. Sloane_ %E A034779 Offset corrected by _Andrew Howroyd_, Feb 11 2018