7904456domain: NAppears in sequencesa(0) = 1; for n > 0, a(n) = binomial(n, floor(n/2)) + binomial(n-1, floor(n/2)).at n=25A050168a(n) = C(n)*(3n+2) where C(n) = Catalan numbers = A000108.at n=12A05196012-dimensional square numbers.at n=13A266561