A. Blokhuis et Ae. Brouwer, The universal embedding dimension of the near polygon on the 1-factors of a complete graph, DES CODES C, 17(1-3), 1999, pp. 299-303
We sho that the universal embedding dimensions (over F-2) of the near polyg
ons associated with Sym(2n) (viewed as subgroup of Sp(2n-2, 2)) are the Cat
alan numbers.