%I
%S 2,4,7,11,13,22,23,332,560,565,566,568,3249,3258,3265,3275,3303,3308,
%T 3311,3315,3578,3580,3581,3585,3587,3589,3596,3622,3623,3628,3631,
%U 4649,4650,4652,4659,4661,4685,4700,4701,5963,5966,5969,6035,6039,6066,6069
%N Define a sequence of fractions by x(m+1) = (x(m)^2+x(m)1)/(x(m)+1) with x(1)=1; sequences gives values of n such that sgn(x(n))<>sgn(x(n1)).
%e x(0)=1, x(1) = 1/2, x(2) = 1/6 so a(1) = 2 because sgn(x(1)) <> sgn(x(2))
%K nonn
%O 1,1
%A Jonathan Ayres (jonathan.ayres(AT)btinternet.com), Oct 16 2001
