Ruby version of https://gist.github.com/pbevin/b87beb6c00969697b690

e.rb

q,r,t,k,n = 1,0,1,1,2,3

loop do
  if 2*q+r-t < n*t
    print n
    q,r,t,k,n = 10*q,10*(r-n*t),t,k,(10*(q+r))/t-10*n
  else
    r,t,k,n = (q+r)*k, t*k, k+1, (q+r*k)/(t*k)
  end
end