a(n) = U_{2*n-1}(n)/(2*n) where U_{n}(x) is a Chebyshev polynomial of the second kind.

A323181

a(n) = U_{2*n-1}(n)/(2*n) where U_{n}(x) is a Chebyshev polynomial of the second kind.

Terms

    a(0) =1a(1) =14a(2) =1155a(3) =238204a(4) =92208005a(5) =57723886506

External references