192350domain: NAppears in sequencesNumber of Sylvester classes of 3-packed words of degree n.at n=7A243659Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = (-1)^n * Sum_{j=0..n} (-2)^j * binomial(n,j) * binomial(k*n+j+1,n)/(k*n+j+1).at n=62A336573