708587

Appears in sequences

• Number of alpha-beta evaluations in a tree of depth n and branching factor b=3.at n=23A060647
• Clique number of commuting graph of symmetric group S_n.at n=37A135908
• Clique number of commuting graph of alternating group A_n.at n=37A135909
• a(n) = 4*3^n-1.at n=11A171498
• Expansion of (1+3*x+5*x^2-x^3)/((1-x^2)*(1-3*x^2)).at n=23A220944
• Expansion of g.f.: (1 + x - 2*x^2 + 2*x^4)/((1-x)*(1-3*x^2)).at n=24A358027