Programming Exercise (HP-15C, 15C LE - and others)

[Thomas Klemm]

Now we have 3 different ways to calculate the same thing:

1. Borwein's formula using tangent numbers
2. Convergence acceleration using Euler's transformation
3. Gerson's method using continued fractions
   

Do you have a proof of your formula or is it still a conjecture? Congratulations to your discovery! Your method appears to be more efficient than the other two.

Kind regards
Thomas

Quote:The first parameter is the number of terms in the continued fraction, minus one.

This parameter is ignored. Instead the 2nd parameter is used twice (cf. lines 14-15).