5696122domain: NAppears in sequencesa(1) = 1, a(2) = 0; for n > 2, a(n) = n*Fibonacci(n-2) (with the convention Fibonacci(0)=0, Fibonacci(1)=1).at n=28A006490Fibonacci sequence beginning 0, 29.at n=27A022363a(n) = n*Fibonacci(n-2) + ((-1)^n + 1)/2.at n=29A323812