a(n) = Fibonacci(4*n+2) + 3*Fibonacci(2*n+1)^2.

A360467

a(n) = Fibonacci(4*n+2) + 3*Fibonacci(2*n+1)^2.

Terms

    a(0) =4a(1) =20a(2) =130a(3) =884a(4) =6052a(5) =41474a(6) =284260a(7) =1948340a(8) =13354114a(9) =91530452a(10) =627359044a(11) =4299982850a(12) =29472520900a(13) =202007663444

External references