Modified exponential summation
91316
Sum of the series $\sum _{ r=1 }^{ \infty }{ \frac { { r }^{ 3 } }{ r! } } $
130083
Evaluating sum of a combination series
146274
Fastest way to do this double summation?
27001
How to calculate the following sum:
15932
How to simplify the summation kk! without using induction?
36674
Summation of series $\sum_{n=1}^\infty \frac{n^a}{b^n}$?
143112
Series Summation,Convergence
143945
Summation of combination of binomial coefficient
27637
How can I apply Newton's sums to solve this problem?
91395
Distribution of sum of exponentials
119606
Closed form of summation
113633
sum of series using mean value theorem
42745
Validity and Equivalence of two definitions of the real exponential function
74149
Reducing an indicator function summation into a simpler form.
78632
Summation equation for $2^{x-1}$
155250
Summation Series for fractions
39659
Is there a closed formula for this summation?