172186883

Appears in sequences

• Number of alpha-beta evaluations in a tree of depth n and branching factor b=3.at n=33A060647
• a(n) = 3^(p-1) + (3^p - 1) where p is the n-th prime.at n=6A098116
• a(n) = 4*3^n-1.at n=16A171498
• a(n) = 4*9^n-1.at n=8A198961
• Expansion of (1+3*x+5*x^2-x^3)/((1-x^2)*(1-3*x^2)).at n=33A220944