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%I #9 Jun 05 2015 03:19:50
%S 4,15,209,1116,3807,53985,287844,982255,13927857,74262716,253417919,
%T 3593333185,19159492804,65380840911,927066033809,4943074880796,
%U 16868003537055,239179443389601,1275294159752484,4351879531719343,61707369328483185
%N Numerators b(n) of Pythagorean approximations b(n)/a(n) to 7/4.
%C See A195500 for discussion and list of related sequences; see A195568 for Mathematica program.
%F Empirical g.f.: -x*(x^8-x^7-4*x^6-272*x^5+48*x^4-88*x^3-209*x^2-15*x-4) / (x^9-257*x^6-257*x^3+1). - _Colin Barker_, Jun 04 2015
%Y Cf. A195500, A195568, A195570.
%K nonn
%O 1,1
%A _Clark Kimberling_, Sep 21 2011