I frequently need to know facts about classical Lie algebras like $\mathfrak{su}(n)$, $\mathfrak{so}(n)$, $\mathfrak{sl}(2)$... and do not have time to try and compute all of it. I would like to know if there is a text or table I can use which has the main properties of such algebras, such as the structure constants, dimensionality, characters, ...
In particular, I would like to find a reference with the second Casimir invariant for the adjoint representation of $\mathfrak{so}(n)$, for example.