A195563 - OEIS

%I #9 Jun 04 2015 14:31:22

%S 0,7,9,16,399,657,1040,26391,43289,68640,1741343,2856481,4529184,

%T 114902311,188484393,298857520,7581811119,12437113521,19720067120,

%U 500284631607,820661007929,1301225572416,33011203874879,54151189409857

%N Numerators b(n) of Pythagorean approximations b(n)/a(n) to 1/4.

%C See A195500 for discussion and list of related sequences; see A195562 for Mathematica program.

%F 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 Cf. A195500, A195562, A195564.

%K nonn

%O 1,2

%A _Clark Kimberling_, Sep 21 2011