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 A017305 #47 Apr 12 2025 09:49:56 %S A017305 3,13,23,33,43,53,63,73,83,93,103,113,123,133,143,153,163,173,183,193, %T A017305 203,213,223,233,243,253,263,273,283,293,303,313,323,333,343,353,363, %U A017305 373,383,393,403,413,423,433,443,453,463,473,483,493,503,513,523,533 %N A017305 a(n) = 10*n + 3. %C A017305 Apart from initial term(s), dimension of the space of weight 2n cusp forms for Gamma_0(38). %H A017305 Vincenzo Librandi, <a href="/A017305/b017305.txt">Table of n, a(n) for n = 0..5000</a> %H A017305 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>. %H A017305 William A. Stein, <a href="http://wstein.org/Tables/dimskg0n.gp">Dimensions of the spaces S_k(Gamma_0(N))</a>. %H A017305 William A. Stein, <a href="http://wstein.org/Tables/">The modular forms database</a>. %H A017305 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1). %F A017305 a(n) = A017198(n) - A156677(n+2). - _Reinhard Zumkeller_, Jul 13 2010 %F A017305 a(n) = 2*a(n-1) - a(n-2). - _Vincenzo Librandi_, May 28 2011 %F A017305 G.f.: (3+7*x)/(x-1)^2. - _R. J. Mathar_, Apr 11 2016 %F A017305 E.g.f.: exp(x)*(3 + 10*x). - _Stefano Spezia_, Aug 22 2023 %F A017305 a(n) = A016885(2*n). - _Elmo R. Oliveira_, Apr 10 2025 %t A017305 Range[3, 1000, 10] (* _Vladimir Joseph Stephan Orlovsky_, May 28 2011 *) %o A017305 (Magma) [10*n+3: n in [0..60]]; // _Vincenzo Librandi_, May 28 2011 %Y A017305 Cf. A008592, A016885, A017198, A017281, A017293, A156677. %K A017305 nonn,easy %O A017305 0,1 %A A017305 _N. J. A. Sloane_