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 A195560 #5 Mar 30 2012 18:57:48 %S A195560 0,3,60,161,559,660,3597,78480,208079,726481,856080,4669203,101866380, %T A195560 270087281,942970879,1111191780,6060621597,132222483360,350573081759, %U A195560 1223975475361,1442326073760,7866682164003,171624681534300,455043590036801 %N A195560 Numerators b(n) of Pythagorean approximations b(n)/a(n) to 2/3. %C A195560 See A195500 for discussion and list of related sequences; see A195559 for Mathematica program. %Y A195560 Cf. A195500, A195559, A195561. %K A195560 nonn %O A195560 1,2 %A A195560 _Clark Kimberling_, Sep 21 2011