102334152domain: NAppears in sequencesa(n) = Fibonacci(n) - 3. Number of total preorders.at n=36A006327a(n) = Fibonacci(4n)-3, or Fibonacci(2n-2)*Lucas(2n+2).at n=9A081074a(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=38A348591