109486080

Appears in sequences

• a(n) = A062401(2^n-1).at n=28A096853
• a(n) = phi(binomial(2*n,n)*n).at n=14A131928
• G.f. A(x) satisfies: A(x)^2 + A(-x)^2 = 2 and A(x)^3 - A(-x)^3 = 36*x.at n=9A196868