439658domain: NAppears in sequencesNumber of truth tables of bracketed formulas (case 3).at n=10A218045Square 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+2*r+k,r) * binomial(r,n-r)/(n+2*r+k) for k > 0.at n=63A378290