73681909211domain: NAppears in sequencesa(n) = 5*F(n)^2 + 5*F(n) + 1, where F(n) = Fibonacci(n).at n=26A1242975 F(2n) (F(2n) + 1) + 1 where F(n) denotes the n-th Fibonacci number.at n=13A156095