189936domain: NAppears in sequencesTriangle read by rows: T(n,k) = (n!/k!) * [x^n] x^k*(1+x+x^2)^(k*x).at n=36A202189Number of 3X3X3 triangular 0..n arrays with some element plus some adjacent element totalling n+1 exactly once.at n=7A270511E.g.f.: Product_{k>0} (1 + tanh(x^k/k)).at n=9A270598