117561domain: NAppears in sequences4th elementary symmetric function of C(n,0), C(n,1), ..., C(n,n).at n=3A025133a(n) = 2*binomial(2*n,n)/(n+1) - n.at n=10A132788Triangle read by rows. Row n gives the coefficients of Product_{k=0..n-1} (x - binomial(n-1,k)) expanded in decreasing powers of x, with row 0 = {1}.at n=32A355635