18077431

Appears in sequences

• Number of primitive n X n real (0,1)-matrices.at n=5A070322
• Triangular array read by rows. T(n,k) is the number of convergent Boolean relation matrices on [n] containing exactly k strongly connected components, n>=0, 0<=k<=n.at n=16A365547
• Triangular array read by rows. T(n,k) is the number of strongly connected binary relations on [n] (A186081) with period k, n >= 1, 1<=k<=n.at n=10A367948
• Triangular array read by rows. T(n,k) is the number of binary relations R on [n] such that the unique idempotent relation in {R^i:i>=1} is a quasi-order containing exactly k strongly connected components.at n=11A370385