Pi = (6 * (f(n) / f(n-1) ) ^ 2 ) / 5  For f(100) Pi = 
 3.1416407864998738178455042012421028889696661797519415169031853363179607185884378850460052490234375000

 Pi = 6 * ( ( (sqrt(5) + 1) / 2 ) ^ 2) Pi = 
 3.141640786499873817845504201242102888969666179751941516903185336317960718588437885046005249023437500e0

 Pi = 6 * ( ( (sqrt(5) + 1) / 2 ) + 1) Pi = 
 3.141640786499873817845504201242102888969666179751941516903185336317960718588437885046005249023437500e0
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