2331108domain: NAppears in sequencesIrregular triangular array read by rows. T(n,k) is the number of simple labeled graphs on [n] with circuit rank equal to k, n >= 1, 0 <= k <= binomial(n-1,2).at n=43A372153Number of labeled simple graphs on n vertices with a unique cycle of length > 2.at n=8A372193