The sum of the fourth powers of the first $n$ positive integers
35525
Methods to compute $\sum_{k=1}^nk^p$ without Faulhaber's formula
108274
Sum of the first $n$ triangular numbers - induction
131708
Sum of powers of natural numbers
36694
Sum of first n natural numbers proof
39698
On uniqueness of sums of prime powers
10920
$\delta_2(n)$ the sum of the squares of the positive divisors of $n$.
35027
Need help with continuing an idea concerning showing that $4\sum\limits_{n \ge 1} a_n^2 \ge \sum\limits_{n \ge 1} \frac1{n^2}(a_1+...+a_n)^2 $
69679
Geometric interpretation for sum of fourth powers
108318
counting proof for $\sum_{k=0}^{n-1} 2^{k} = 2^n - 1$
132728
Can the sum of the first $p$ factorials ever be a perfect power for $\ p>3\ $?
151384
Summation of series involving binomial coefficients and polynomial of degree at most n-1
63661
integers $n$ such that $(n-1)!+1$ is a power of $n$
78593
Prove that the product of four consecutive positive integers plus one is a perfect square
72402
Summation of natural number set with power of $m$
92440
Let $n \in \mathbb{Z}^+$, prove the identity $ \sum_{k=1}^{n-1} \binom {n} {k} \frac{kn^{n-k}}{k+1}=\frac{n(n^{n}-1)}{n+1}$
52951
Find all $n \in \mathbb{Z^+}$ such that $\phi(n)=4$
26607
The idea behind the sum of powers of 2