406396

Appears in sequences

• Expansion of Product_{k>=1} 1/((1-x^(3*k-1))*(1-x^(3*k-2)))^k.at n=42A262883
• Number of (undirected) Hamiltonian paths in the 3 X n king graph.at n=5A339761
• Array read by antidiagonals: T(m,n) is the number of (undirected) Hamiltonian paths in the m X n king graph.at n=30A350729
• Array read by antidiagonals: T(m,n) is the number of (undirected) Hamiltonian paths in the m X n king graph.at n=33A350729
• G.f. satisfies: A(x) = Series_Reversion(x - x^2*A'(x)^2).at n=6A360977