931584domain: NAppears in sequencesBond percolation series for square lattice.at n=25A006727Triangle T, read by rows, where the g.f. of column k in matrix power T^m is given by: 1/(1-x)^m = Sum_{n>=k} [T^m](n,k) * x^(n-k)/(1+x)^{n(n-1)/2 - k(k-1)/2} for k>=0.at n=57A141760Column 2 of triangle A141760.at n=8A141762