34360262656domain: NAppears in sequencesa(n) = n^5*(n^4 + 1)/2.at n=16A168372a(n) = n^10*(n^8 + 1)/2.at n=4A170800The number of simple labeled graphs on n nodes where two such graphs are considered equivalent iff one can be obtained from the other by reversing the labeling.at n=8A199574