How to find the closed form of $f(n) = 9^k \times (-56) + f(n-1)$
13418
Solve the recurrence
133160
Closed form for $\int_0^\infty\frac{1}{(1+x^2)^s}\,dx$ when $s\in (0.5,\infty)\setminus\mathbb{N}$
110569
Does anyone know a closed-form expression for a bijection between $\mathbb{N}^k$ and $\mathbb{N}$?
925
Prove that $F_n={n-1 \choose 0 }+{n-2 \choose 1 }+{n-3 \choose 2 }+\ldots$ where $F(n)$ is the $n$-th fibonacci number
23726
A closed form for $1^{2}-2^{2}+3^{2}-4^{2}+ \cdots + (-1)^{n-1}n^{2}$
155995
Fibonacci proof question: $f_{n+1}f_{n-1}-f_n^2=(-1)^n$
42736
Is there a closed form for $\sum_{k=0}^n \frac{x^k}{k!}$?
102490
Does this recursive sequence have a closed-form?
35855
Closed form for an infinite product
93227
Change the Recursive Relation into Formula : $f(n,k) = f(n-1,k) + f(n-2, k-1)$
39909
Getting a closed form from $\sum_{i=1}^{n-1} \sum_{j=i+1}^{n} \sum_{k=1}^{j} 1$
121617
Closed form of $\sum_{n=0}^{\infty} \frac{\cos(\alpha \, n)}{n!}$
38568
Finding the number of zeros of $f(z) = z^n$ if $|f(z)| < 1 $ for all $z$ with $|z|=1$.
5537
Closed form for $ \int_0^\infty {\frac{{{x^n}}}{{1 + {x^m}}}dx }$
58144
Solve the recurrence relation:$ T(n) = \sqrt{n} T \left(\sqrt n \right) + n$
39659
Is there a closed formula for this summation?
14784
Inductive proof of the closed formula for the Fibonacci sequence