Anybody know how to express odd factorials?

[YoYoBabyYo]

I am trying to find a formula to express odd or even factorials, for example:

1*3*5*7*...*n

or

2*4*6*8...*n

I searched google, but had no luck. Does anybody have a clue what the formula is?

 

[Chaotic42]

Well, 2n-1 is always odd and 2n is always even.

Are you looking for a mathematical forumla, or a way to do it in programming?

 

[SmoochyTX]

Google?

 

[YoYoBabyYo]

Originally posted by: SmoochyTX
Google?

I had no luck with Google. Either that or my searching skills suck.

 

[SmoochyTX]

Originally posted by: YoYoBabyYo

Originally posted by: SmoochyTX
Google?

I had no luck with Google. Either that or my searching skills suck.

Well um....

 

[vrbaba]

n even: (n/2)!*2^(n/2)

 

[vrbaba]

n!/(((n-1)/2)!*2^((n-1)/2))

 

[YoYoBabyYo]

Huh! Let me try those out!

 

[vrbaba]

Originally posted by: YoYoBabyYo
Huh! Let me try those out!

Updated n odd, check above

 

[quakefiend420]

YOyoYO has a kid? 😕

 

[SynthDude2001]

Originally posted by: quakefiend420
YOyoYO has a kid? 😕

:shocked:

 

[YoYoBabyYo]

Originally posted by: vrbaba

Originally posted by: YoYoBabyYo
Huh! Let me try those out!

Updated n odd, check above

I was going to ask about the odd, but the even seemed to have worked! May I ask how you knew? :thumbsup:

Sorry to break the bad news, but YoyoYo does not have a kid. 😀

 

[vrbaba]

Originally posted by: YoYoBabyYo

Originally posted by: vrbaba

Originally posted by: YoYoBabyYo
Huh! Let me try those out!

Updated n odd, check above

I was going to ask about the odd, but the even seemed to have worked! May I ask how you knew? :thumbsup:

Sorry to break the bad news, but YoyoYo does not have a kid. 😀

courtesy Chuckywang <-- :beer: