// PiFast, copyright 1999-2001 Xavier Gourdon 
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       *    User constant file definition    *
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Version : 4.0
Constant name : Log2_Sebah2
Comments :
log(2) = 4*arctanh(1/7)+2*arctanh(1/17) (Sebah 1997)

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Number of series : 2

Series number 0
Beta : 4
Series type : 2
Z : 1/7

Series number 1
Beta : 2
Series type : 2
Z : 1/17

Approximate value : Log2_Sebah2 = 0.693147180560