716425domain: 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=24A006490Fibonacci sequence beginning 0, 25.at n=23A022359a(n) = n*Fibonacci(n-2) + ((-1)^n + 1)/2.at n=25A323812