The 3-adic valuations of Stirling numbers of the first kind

Min Qiu, Zongbing Lin, Long Chen

Let $v_3$ denote the usual $3$-adic valuation, and let $s(n,k)$ be the unsigned Stirling number of the first kind. In this paper, for $a\in \{1,2\}$, we determine the values of $v_…