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 A195578 #7 Mar 30 2012 18:57:48 %S A195578 0,3,33,180,611,1909,2340,12567,163797,879480,2996279,9346681, %T A195578 11463480,61551003,802279833,4307690700,14675777531,45780038029, %U A195578 56148124860,301476797967,3929566460397,21099068166960,71881955354159,224230616915761 %N A195578 Numerators b(n) of Pythagorean approximations b(n)/a(n) to 3/5. %C A195578 See A195500 for discussion and list of related sequences; see A195577 for Mathematica program. %Y A195578 Cf. A195500, A195577, A195579. %K A195578 nonn,frac %O A195578 1,2 %A A195578 _Clark Kimberling_, Sep 21 2011