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%I #9 Jun 05 2015 03:20:14
%S 0,9,11,20,819,1221,2020,83629,124431,206040,8529239,12690841,
%T 21014040,869898849,1294341251,2143226060,88721153259,132010116861,
%U 218588044060,9048687733669,13463737578471,22293837268080,922877427680879
%N Numerators b(n) of Pythagorean approximations b(n)/a(n) to 1/5.
%C See A195500 for discussion and list of related sequences; see A195571 for Mathematica program.
%F Empirical g.f.: -x^2*(x^7-x^6-110*x^4+90*x^3-20*x^2-11*x-9) / (x^9-101*x^6-101*x^3+1). - _Colin Barker_, Jun 04 2015
%Y Cf. A195500, A195571, A195573.
%K nonn
%O 1,2
%A _Clark Kimberling_, Sep 21 2011