a(n) = sqrt(5*b(n)^2 - 4) with b(n) = Fibonacci(6*n+5) = A134497(n).

A305316

a(n) = sqrt(5*b(n)^2 - 4) with b(n) = Fibonacci(6*n+5) = A134497(n).

Terms

    a(0) =11a(1) =199a(2) =3571a(3) =64079a(4) =1149851a(5) =20633239a(6) =370248451a(7) =6643838879a(8) =119218851371

External references