La Serie Armónica

\sum_{n=1}^{∞ }{\frac{1}{n} }= ∞

k = 1 (slider from 1 to 20000, step 1)
armonica = Sequence(1 / n, n, 1, k)
a = Sum(armonica)
texto1: "\sum_{n=1}^{" + (LaTeX[k]) + "}{\frac{1}{n} }=" + (LaTeX[a]) + ""