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 A195563 #9 Jun 04 2015 14:31:22 %S A195563 0,7,9,16,399,657,1040,26391,43289,68640,1741343,2856481,4529184, %T A195563 114902311,188484393,298857520,7581811119,12437113521,19720067120, %U A195563 500284631607,820661007929,1301225572416,33011203874879,54151189409857 %N A195563 Numerators b(n) of Pythagorean approximations b(n)/a(n) to 1/4. %C A195563 See A195500 for discussion and list of related sequences; see A195562 for Mathematica program. %F A195563 Empirical g.f.: -x^2*(x^7-x^6-72*x^4+56*x^3-16*x^2-9*x-7) / (x^9-65*x^6-65*x^3+1). - _Colin Barker_, Jun 04 2015 %Y A195563 Cf. A195500, A195562, A195564. %K A195563 nonn %O A195563 1,2 %A A195563 _Clark Kimberling_, Sep 21 2011