@article {IOPORT.05577872,
    author       = {Sun, Xinyu and Moll, Victor H.},
    title        = {The $p$-adic valuations of sequences counting alternating sign matrices.},
    year         = {2009},
    journal      = {Journal of Integer Sequences [electronic only]},
    volume       = {12},
    number       = {3},
    issn         = {1530-7638},
    pages        = {Article ID 09.3.8, 24 p., electronic only},
    publisher    = {School of Computer Science, University of Waterloo, Waterloo, ON},
    abstract     = {Summary: The $p$-adic valuations of a sequence of integers counting alternating sign symmetric matrices are examined for $p = 2$ and $p = 3$. Symmetry properties of their graphs produce a new proof of the result that characterizes the indices that yield an odd number of matrices.},
    identifier   = {05577872},
}