58752000

Appears in sequences

• a(n) = ((2*n-1)!!/sqrt(3))*(integral_{x=0..sqrt(3/4)} 1/(1-x^2)^(n+1/2) dx).at n=6A089252
• Numbers such that UnitaryPhi(2*UnitaryPhi(n)) = n.at n=25A117820
• a(n) = phi(10^n-1), where phi is Euler's totient function (A000010).at n=7A295503
• Triangle read by rows: T(n,k) = number of closed trails of length k starting and ending at a fixed vertex in the complete undirected graph on n labeled vertices, for n >= 1 and k = 0 .. n(n-1)/2.at n=58A357885