a(n) = U(n, (n+3)/2) where U(n, x) is a Chebyshev polynomial of the 2nd kind.

A342168

a(n) = U(n, (n+3)/2) where U(n, x) is a Chebyshev polynomial of the 2nd kind.

Terms

    a(0) =1a(1) =4a(2) =24a(3) =204a(4) =2255a(5) =30744a(6) =499121a(7) =9409960a(8) =202176360a(9) =4878316860a(10) =130651068911

External references