5702884domain: NAppears in sequencesa(n) = Fibonacci(n) - 3. Number of total preorders.at n=30A006327a(n) = Fibonacci(4n+2) - 3.at n=7A081075a(n) = L(n)*L(n+1) mod F(n+2) where F=A000045 is the Fibonacci numbers and L = A000032 is the Lucas numbers.at n=32A348591