58533

Appears in sequences

• Number of disconnected 3 X n binary matrices.at n=6A054421
• Poincaré series for hyperbolic reflection group with Coxeter diagram o-(5)-o---o-(5)-o.at n=22A265048
• a(n) = 3^n - 3*binomial(n,3) - 3*binomial(n,2) - 2*n - 1.at n=10A383343