I have a paper where I am trying to show that the growth of a certain function is exponential of the order $a^n$. I would like to compute $a$, at least approximately. The base $a$ …

This is a question about recommended style for a paper. I am able to show an upper bound of the form $f(n) = O(c^n)$. While I have a formula satisfied by $c$, it is a messy formul …