%I A028939
%S A028939 1,1,1,125,64,24389,2146689,274625,50202571769,4302115807744,
%T A028939 1469451780501769,13528653463047586625,343216282443844010111,
%U A028939 63061816101171948456692661,495133617181351428873673516736
%N A028939 Denominator of y coordinate of (2n+1)*P where P is generator for rational 
               points on curve y^2+y = x^3-x.
%D A028939 B. Mazur, Arithmetic on curves, Bull. Amer Math. Soc. 14 (1986), 207-259; 
               see p 225.
%F A028939 P=(0, 0), 2P=(1, 0), if kP=(a, b) then (k+1)P=(a'=(b^2-a^3)/a^2, b'=1-b*a'/
               a).
%Y A028939 Sequence in context: A077495 A030668 A030678 this_sequence A080538 A104233 
               A046759
%Y A028939 Adjacent sequences: A028936 A028937 A028938 this_sequence A028940 A028941 
               A028942
%K A028939 nonn
%O A028939 0,4
%A A028939 N. J. A. Sloane (njas(AT)research.att.com).