14413725697domain: NAppears in sequencesExpansion of 1/((1-2*x)^6*(1-x)).at n=18A211388Square array read by antidiagonals: T(n,k) = Sum_{j = 0..n*k} binomial(n+j-1,j)*2^j; n,k >= 0.at n=48A333560a(n) = Sum_{j = 0..3*n} binomial(n+j-1,j)*2^j.at n=6A333562