343141433761domain: NAppears in sequencesa(n) = Sum_{k=0..n-1} binomial(2*n,2*k)*a(k)*a(n-k-1).at n=8A002067Regular triangle whose rows are the coefficients of the Dominici expansion of f(t,x) = (1/2)*(1 - t^2)^(-x) with respect to t.at n=28A320842