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 A022701 #12 Jul 20 2018 06:03:19
%S A022701 1,-9,27,-30,72,-387,738,-801,2889,-8119,13005,-25038,57735,-122643,
%T A022701 247788,-432786,862497,-1944657,3520721,-6191280,12743919,-24916977,
%U A022701 45349101,-83116206,156731304,-299550636,547421607
%N A022701 Expansion of Product_{m>=1} 1/(1 + m*q^m)^9.
%H A022701 G. C. Greubel, <a href="/A022701/b022701.txt">Table of n, a(n) for n = 0..1000</a>
%F A022701 G.f.: exp(-9*Sum_{j>=1} Sum_{k>=1} (-1)^(j+1)*k^j*x^(j*k)/j). - _Ilya Gutkovskiy_, Feb 08 2018
%t A022701 With[{nmax = 50}, CoefficientList[Series[Product[(1 + k*q^k)^-9, {k, 1, nmax}], {q, 0, nmax}], q]] (* _G. C. Greubel_, Jul 19 2018 *)
%o A022701 (PARI) m=50; q='q+O('q^m); Vec(prod(n=1,m,(1+n*q^n)^-9)) \\ _G. C. Greubel_, Jul 19 2018
%Y A022701 Column k=9 of A297325.
%K A022701 sign
%O A022701 0,2
%A A022701 _N. J. A. Sloane_