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 A239104 #6 Mar 25 2014 17:37:55 %S A239104 1,1,0,2,-1,7,-12,38,-99 %N A239104 Coefficients of generating function related to Riordan array in A168151. %C A239104 See Baccherini et al. for precise definition. %H A239104 D. Baccherini, D. Merlini, R. Sprugnoli, <a href="http://dx.doi.org/10.1016/j.disc.2006.07.023">Binary words excluding a pattern and proper Riordan arrays</a>, Discrete Math. 307 (2007), no. 9-10, 1021--1037. MR2292531 (2008a:05003). See page 1036. %Y A239104 Cf. A168151. %K A239104 sign,more %O A239104 0,4 %A A239104 _N. J. A. Sloane_, Mar 25 2014