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 A022673 #11 Sep 08 2022 08:44:46
%S A022673 1,-13,52,13,-546,676,1911,-962,-9282,-13624,53027,57408,-48334,
%T A022673 -222912,-558402,517803,1776723,2996227,-1100554,-14813461,-12542478,
%U A022673 -3043521,50552853,110798116,84474624,-114111322,-650898679,-771617782,-206121175,1974416808,4748905980,5776813289
%N A022673 Expansion of Product_{m >= 1} (1-m*q^m)^13.
%H A022673 G. C. Greubel, <a href="/A022673/b022673.txt">Table of n, a(n) for n = 0..1000</a>
%t A022673 With[{nmax = 50}, CoefficientList[Series[Product[(1 - k*q^k)^13, {k, 1, nmax}], {q, 0, nmax}], q]] (* _G. C. Greubel_, Feb 24 2018 *)
%o A022673 (PARI) m=50; q='q+O('q^m); Vec(prod(n=1,m,(1-n*q^n)^13)) \\ _G. C. Greubel_, Feb 24 2018
%o A022673 (Magma) Coefficients(&*[(1-m*x^m)^13:m in [1..40]])[1..40] where x is PolynomialRing(Integers()).1; // _G. C. Greubel_, Feb 24 2018
%K A022673 sign
%O A022673 0,2
%A A022673 _N. J. A. Sloane_
%E A022673 Terms a(26) onward added by _G. C. Greubel_, Feb 24 2018