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 A306937 #8 Mar 17 2019 00:03:49
%S A306937 -1,0,0,44,330,0,0,4224,7524,0,0,30600,23276,0,0,130944
%N A306937 Coefficients of q-expansion of Eisenstein series G_{11/2}(tau) multiplied by 132.
%H A306937 D. Zagier, <a href="https://people.mpim-bonn.mpg.de/zagier/files/tex/UtrechtLectures/UtBook.pdf">Modular Forms of One Variable</a>, Notes based on a course given in Utrecht, 1991. See page 50.
%Y A306937 Cf. A259825, A306934-A306936.
%K A306937 sign,more
%O A306937 0,4
%A A306937 _N. J. A. Sloane_, Mar 16 2019