Question 967307
For the following sequence calculate the indicated term: 
a(1) = 1
a(n+1) = 2*a(n)+1
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a(2) = 2*1+1 = 3
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a(3) = 2*3+1 = 7
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a(4) = 2*7+1 = 15
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Cheers,
Stan H.
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