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 A195688 #5 Mar 30 2012 18:57:48 %S A195688 4,15,45,3016,7119,700625,424496,569883075,614724165,29802502503, %T A195688 147259295688,1582627794499,18634518228117,1973646616563639, %U A195688 1146044323606678197,41830280831514255267,370889360592907981397560,26770920007080137664392439 %N A195688 Numerators b(n) of Pythagorean approximations b(n)/a(n) to (1+sqrt(5))/2 (the golden ratio). %C A195688 See A195500 for discussion and list of related sequences; see A195687 for Mathematica program. %Y A195688 Cf. A195500, A195687, A195689. %K A195688 nonn %O A195688 1,1 %A A195688 _Clark Kimberling_, Sep 22 2011