58199208domain: NAppears in sequencesCentral octonomial coefficients: largest coefficient of (1+x+...+x^7)^n.at n=10A025013Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(n,k) is the constant term in the expansion of ( Sum_{j=1..k} x_j^(2*j-1) + x_j^(-(2*j-1)) )^(2*n).at n=50A329020