a(n) = 5^(n-1) * U(n-1, 7/5) where U is the Chebyshev polynomial of the second kind.

A099158

a(n) = 5^(n-1) * U(n-1, 7/5) where U is the Chebyshev polynomial of the second kind.

Terms

    a(0) =0a(1) =1a(2) =14a(3) =171a(4) =2044a(5) =24341a(6) =289674a(7) =3446911a(8) =41014904a(9) =488035881a(10) =5807129734a(11) =69098919251a(12) =822206626164

External references