141848domain: NAppears in sequencesEuler transform of powers of 8.at n=5A144072Number of n X n 0..6 matrices with each 2X2 subblock idempotent.at n=13A224663Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(k^3).at n=31A343283