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 A192470 #7 Nov 12 2012 09:54:54 %S A192470 1,4,22,112,589,3100,16393,86800,459994,2438536,12929377,68557720, %T A192470 363537265,1927735708,10222301758,54206461120,287444443765, %U A192470 1524252798580,8082769233721,42861108613288,227282835266626,1205229864917272 %N A192470 (A192469)/2. %C A192470 See A192469. %F A192470 Empirical G.f.: -x*(x-1)*(3*x-1)/((3*x^2+x-1)*(9*x^2-7*x+1)). [_Colin Barker_, Nov 12 2012] %t A192470 (See A192468.) %Y A192470 Cf. A192469. %K A192470 nonn %O A192470 1,2 %A A192470 _Clark Kimberling_, Jul 01 2011