28144128251domain: NAppears in sequencesOdd-indexed terms of A124297.at n=12A001604a(n) = 5*F(n)^2 + 5*F(n) + 1, where F(n) = Fibonacci(n).at n=25A124297Lucas Aurifeuillian primitive part B of Lucas(10*n - 5).at n=12A190781