A commentary on the continued fraction by which the illustrious La Grange has expressed the binomial powers

Euler gives a continued fraction representation of (1+x)^n involving 1,3,5,7,… and n^2-1,n^2-4,n^3-9,… and squares of z, for x=2y and y=z/(1-z). He evaluates this continued fraction at z=t sqrt(-1), for ``vanishing’’ n, and for infinite n.