# It's all about the Bonus Points

**Discrete Mathematics**Level 3

\[\large B_n = n B_{n-1} + 1 \]

Let \(B_n\) satisfy the recurrence relation above for \(B=1,2,3,\ldots \) and \(B_0 = 1\). What is \(B_{10} \)?

**Bonus**:

You can show me how do derive a closed form solution to this recursion sequence. It exists but I do not know how to derive it yet.

You can interpret this question intuitively and give a real world example of when such a sequence would occur/count.