List of Representations of E - As A Continued Fraction

As A Continued Fraction

Euler proved that the number e is represented as the infinite simple continued fraction (sequence A003417 in OEIS):

Its convergence can be tripled by allowing just one fractional number:

Here are some infinite generalized continued fraction expansions of e. The second is generated from the first by a simple equivalence transformation.


e= 2+\cfrac{1}{1+\cfrac{1}{2+\cfrac{2}{3+\cfrac{3}{4+\cfrac{4}{5+\ddots}}}}} = 2+\cfrac{2}{2+\cfrac{3}{3+\cfrac{4}{4+\cfrac{5}{5+\cfrac{6}{6+\ddots\,}}}}}

This last, equivalent to, is a special case of a general formula for the exponential function:

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