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### Bernoulli number

The Bernoulli numbers (*B _{n}*) are often used in the development of power series

##### Explanation

It is an extensive matter, which has a lot to mean in number theory. Here we give a small insight into it. We know the power series for the tangent

and for the secant

If we add those power series together, we see the Bernoulli numbers

## HistoryThe Swiss mathematician Jakob Bernoulli (1654 - 1705) described the existence of a single series of constants |