143164domain: NAppears in sequencesNumber of solid standard Young tableaux of shape [[(3)^n],[3]].at n=3A211505Number A(n,k) of solid standard Young tableaux of shape [[{n}^k],[n]]; square array A(n,k), n>=0, k>=1, read by antidiagonals.at n=24A214722Number of solid standard Young tableaux of shape [[n,n,n,n],[n]].at n=3A215220