1956816domain: NAppears in sequencesCoefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined at Comments.at n=22A193007Triangular array read by rows: T(n,k) is the number of simple labeled graphs on n nodes whose maximal connected component has at most k nodes, n>=1, 1<=k<=n.at n=33A275364