quantum mechanics - What is the difference between the Balmer series of hydrogen and deuterium?

In my quantum mechanics textbook, it claims that the Balmer series between hydrogen and deuterium is different. However, I was under the impression that the Balmer series

$$H_\alpha, H_\beta, H_\gamma$$ is related by the equation $$\lambda=C\frac{n^2}{n^2-4}$$ where $$ C=3646 \mathring{\text{A}} $$ $$n=3,4,5$$

Is there a equation relating the mass and the Balmer series?

Any hint would be appreciated