OFFSET
1,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..86
B. Mazur, Arithmetic on curves, Bull. Amer. Math. Soc. 14 (1986), 207-259; see p. 225.
FORMULA
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).
a(n) = A028942(2n). - Seiichi Manyama, Nov 19 2016
EXAMPLE
4P = (2, -3).
CROSSREFS
KEYWORD
sign,frac
AUTHOR
STATUS
approved