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 A140512 #5 Sep 08 2013 18:35:04 %S A140512 1,-2,3,-7,10,-12,15,-17,20,-24,27,-35 %N A140512 Limit of A140485 (1, 4, 9, 13) table signed. Denominators of a sequence whose numerators are 1's. %C A140512 With transform in A129891 or A100597 the converging sequence becomes a polynomial family whose roots are on a curve (in imaginary coordinates). See P. Flajolet, X. Gourdon, B. Salvy. %D A140512 P. Flajolet, X. Gourdon, B. Salvy, Gazette des mathematiciens, 1993, 55, pp. 67-78. %K A140512 sign,uned %O A140512 0,2 %A A140512 _Paul Curtz_, Jul 01 2008