233108domain: NAppears in sequencesExpansion of (2/(3*sqrt(1-4*z)-1+4*z))*((1-sqrt(1-4*z))/(2*z))^k with k=6.at n=8A172063Number of 4 X n 0..1 arrays with rows unimodal and columns nondecreasing.at n=13A225011