581140575

Appears in sequences

• Bending a piece of wire of length n+1 (configurations that can only be brought into coincidence by turning the figure over are counted as different).at n=19A001444
• a(n) = 3^n*(3^(n+1)+1)/2.at n=9A051407
• a(n) = n^9*(n^10 + 1)/2.at n=3A170792
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(k^9).at n=8A343289