Is this identity involving Stirling numbers of the first kind well-known? I've been looking in vain (most books I came across give identities involving sums or recurrence relations, but do not give much attention to fixed values) for a reference to the following identity:
$$S(n,n-3)={n \choose 2}{n \choose 4},$$
where $S(n,k)$ is the unsigned Stirling number of the first kind. Is this well-known, or too trivial to be mentioned anywhere?

The identity and the proof for the identity are there in the wiki link you have sent.
