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Question: How do I use a recursion procedure to solve this problem?

Question:How do I use a recursion procedure to solve this problem?

George6626 10 Maple
procedure recurrence recursion
November 26 2013
2

C(n,k)=((2*(k-2-n))/(k*(k-1)))*C(n,k-2)
if n in {even} then C(n,0)=((-1)^(n/2))*(factorial(n)/factorial(n/2)) and C(n,1)=0
if n in {odd} then C(n,0)=0 and C(n,1)=(2*(-1)^((n-1)/2))*(factorial(n)/factorial((n-1)/2))

i've been trying for hours to get a procedure involving this to work :(

Thanks
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