2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/217791The p-adic valuations of a sequence of integers T(n) counting alternating sign matrices is examined for p=2 and p=3. Symmetry properties of their graphs produce a new proof of the result that characterizes the indices for which T(n) is odd.24 pages, 6 figuresNumber TheoryCombinatorics05A10, 11B75, 11Y55text