225851433716domain: NAppears in sequencesa(n) = 7*a(n-1) - a(n-2) + 5.at n=13A003481a(n) = Fibonacci(2*n+2) - 1.at n=27A035508a(n) = Fibonacci(4n) - 1, or Fibonacci(2n+1)*Lucas(2n-1).at n=13A081006a(n) = Fibonacci((prime(n)+3)/2) - 1.at n=27A121569a(n) = F(n)*L(n-2) where F = Fibonacci and L = Lucas numbers.at n=29A128535