a(n) = (1/12)*(Fibonacci(2*n) + Fibonacci(4*n) + Fibonacci(6*n)).

A273625

a(n) = (1/12)*(Fibonacci(2*n) + Fibonacci(4*n) + Fibonacci(6*n)).

Terms

    a(0) =1a(1) =14a(2) =228a(3) =3948a(4) =69905a(5) =1248072a(6) =22352707a(7) =400808856a(8) =7190208684a(9) =129009258070

External references