15732064domain: NAppears in sequencesG.f. satisfies A(x) = 1 + x*(A(x)^2 + A(x)^4).at n=8A219534Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n,r) * binomial(2*n+2*r+k,n)/(2*n+2*r+k) for k > 0.at n=53A378239