119713domain: NAppears in sequencesa(n) = 1 + C(2*n,n) + C(3*n,n).at n=7A029848Number of compositions of n in which the minimal multiplicity of parts equals 7.at n=21A244170Square array A(n,k), n >= 1, k >= 1, read by antidiagonals, where A(n,k) is Sum_{j=1..n} binomial(j*k, k).at n=38A323663