a(n) = (Fibonacci(6*n+3) - 2)/4.

A053606

a(n) = (Fibonacci(6*n+3) - 2)/4.

Terms

    a(0) =0a(1) =8a(2) =152a(3) =2736a(4) =49104a(5) =881144a(6) =15811496a(7) =283725792a(8) =5091252768a(9) =91358824040

External references