Find the sum of $\binom{2007}{0}+\binom{2007}{4}+...+\binom{2007}{2004}$
112253
How to find sums like $\sum_{k=0}^{39} \binom{200}{5k}$
143365
Is $\sum_{i=1}^{n-1}i=\binom{n}{2}$?
140008
I need help with a double sum
112374
Evaluate $ \binom{n}{0}+\binom{n}{2}+\binom{n}{4}+\cdots+\binom{n}{2k}+\cdots$
134361
Calculating the sum of a binomial coefficient series
100896
What is the sum of this? $ 1 + \frac12 + \frac13 + \frac14 + \frac16 + \frac18 + \frac19 + \frac1{12} +\cdots$
74294
How to simplify $\sum_{i=1}^{k}\binom{n + i - 1}{i}$?
146762
Closed form for $\sum_{k=0}^{n} \binom{n}{k}\frac{(-1)^k}{(k+1)^2}$
33986
Calculate $\sum_{n=1}^{\infty}(\frac{1}{2n}-\frac{1}{n+1}+\frac{1}{2n+4})$
8806
Summation of binomial coefficients
37650
Find $\sum_{m=0}^n\ (-1)^m m^n {n \choose m}$
87589
Evaluate $\binom{n}{0}+\binom{n}{2}+\binom{n}{4}+...+\binom{n}{2k}$
57549
Finding the sum $\sum_{k=1}^rk^2\binom {n-k}{r-k}$
155611
Sum of series $\frac{1}{2 \cdot 3 \cdot 4} + \frac{1}{4 \cdot 5 \cdot 6} + \frac{1}{6 \cdot 7 \cdot 8} + \cdots $
147635
Find the sum $\frac{1}{2\cdot 3}+\frac{1}{3\cdot 4}+\dots+\frac{1}{99\cdot 100}$
64803
Counting two ways, $\sum \binom{n}{k} \binom{m}{n-k} = \binom{n+m}{n}$
61270
Binomial Theorem Sum