Is there a formula to calculate the following sum?
634
Closed form formula for $\sum\limits_{k=1}^n k^k$
136066
Find the sum $\sum _{n=1}^{\infty }\left(\sqrt{n+2}-2\sqrt{n+1}+\sqrt{n}\right)$
63965
How can I compute the sum of $ {m\over\gcd(m,n)}$?
38741
Finding a general formula for summation
61270
Binomial Theorem Sum
93617
Sum of the product of two combinations
88973
How do you calculate this sum $\sum_{n=1}^\infty nx^n$?
148883
Sum of the series $\frac{1}{2\cdot 4}+\frac{1\cdot3}{2\cdot4\cdot6}+\dots$
112439
Multiply 2 numbers and then sum
155479
Summation of inner products
89758
Is there a formula for $(1+i)^n+(1-i)^n$?
157280
How do I sum up specific things in Numbers?
148970
How to calculate such sums of Legendre symbols?
83733
sum of polynoms of given property
155439
How can I calculate this Riemann sum?
7302
$\sum k! = 1! +2! +3! + \cdots + n!$ ,is there a generic formula for this?
18796
How to find the sum of the series $1+\frac{1}{2}+ \frac{1}{3}+\frac{1}{4}+\dots+\frac{1}{n}$?