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 A063148 #14 Aug 22 2019 12:18:12 %S A063148 7,30,54,78,102,126,150,174,198,222,246,270,294,318,342,366,390,414, %T A063148 438,462,486,510,534,558,582,606,630,654,678,702,726,750,774,798,822, %U A063148 846,870,894,918,942,966,990,1014,1038,1062,1086,1110,1134 %N A063148 Dimension of the space of weight 2n cusp forms for Gamma_0( 80 ). %H A063148 William A. Stein, <a href="http://wstein.org/Tables/dimskg0n.gp">Dimensions of the spaces S_k(Gamma_0(N))</a>. %H A063148 William A. Stein, <a href="http://wstein.org/Tables/">The modular forms database</a> %F A063148 Conjecture: a(n) = A063128(n). - _R. J. Mathar_, Jul 21 2015 %F A063148 Conjectures from _Colin Barker_, Jun 08 2019: (Start) %F A063148 G.f.: x*(7 + 16*x + x^2) / (1 - x)^2. %F A063148 a(n) = 2*a(n-1) - a(n-2) for n>3. %F A063148 a(n) = 6*(4*n-3) for n>1. %F A063148 (End) %K A063148 nonn %O A063148 1,1 %A A063148 _N. J. A. Sloane_, Jul 08 2001