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Old 2007-04-09, 21:54   #2
T.Rex
 
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Feb 2004
France

91110 Posts
Default First formula works

PARI/gp:

Code:
G(N)=
{x=0;
for(n=0,N,y=1;for(p=0,n,y=y*(2*p+3));x=x+(factorial(n)/(2*y)));print((1-x)*4/Pi)}
In TeX, the formula 1 is: 1-\sum_{n=0}^{\infty}\frac{n!}{\ \ \ \ 2 \prod_{p=0}^{n} (2 p+3)}=\frac{\pi}{4}

Now time to go to bed ...

Tony

Last fiddled with by T.Rex on 2007-04-09 at 21:55
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