The moments of the random variable for the number of returns of a simple random walk

Adrienne W. Kemp
1987 Advances in Applied Probability  
The number of returns to the origin for a simple random walk starting and ending at the origin is reconsidered; closed-form expressions in μ are given for μ 3 and μ 4.
doi:10.2307/1427430 fatcat:muwx5cz55jehlewlzfbun7aenm