ε = 0.2 (slider from 0 to 0.5, step 0.05)
h(x) = 1 - ε
k(x) = 1 + ε
i: y = 1
n_0 = 6 (slider from 1 to 30, step 1)
j: x = n_0
u = Sequence((n, 1 + sin(n) / n), n, 1, 50)