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

A342167

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

Terms

    a(0) =1a(1) =3a(2) =15a(3) =115a(4) =1189a(5) =15456a(6) =242047a(7) =4435929a(8) =93149001a(9) =2205405829a(10) =58130412911

External references