-8208domain: ZAppears in sequencesTriangle T(n,k) = (1-k*(k-1))*A053120(n,k), read by rows, 0<=k<=n.at n=50A137448A000145(n) / 8 - (n^5 + 1).at n=22A188671G.f. A(x) satisfies: (1 + x)/(1 - x) = A(x)*A(x^2)^2*A(x^3)^3*A(x^4)^4* ... *A(x^k)^k* ...at n=23A307659