How to proof that 144 is the only Fibbonacci square number
91560
Square Fibonacci numbers
18461
Sum of odd Fibonacci Numbers
63895
What is the next perfect square of the form 14444... in decimal notation?
135458
When is a sum of consecutive squares equal to a square?
156383
Proving a combinatorial identity without double counting
94958
Prob. 6 (d), Chap. 1, in Baby Rudin, 3rd ed: How to complete this proof?
43033
Proof on Catalan numbers
58264
How to derive the formula for the sum of the first $n$ perfect squares?
12910
For the Fibonacci numbers, show for all $n$: $F_1^2+F_2^2+\dots+F_n^2=F_nF_{n+1}$
132333
Fibonacci number that ends with 2014 zeros?
17269
Strong Induction Proof: Fibonacci number even if and only if 3 divides index
74615
Carmichael number square free
25826
Proof of a combinatorial identity: $\sum\limits_{i=0}^n {2i \choose i}{2(n-i)\choose n-i} = 4^n$
76977
Prove that $f(n)$ is the nearest integer to $\frac12(1+\sqrt2)^{n+1}$?
90329
Prove there is no simple group of order $729$
19588
$n!+1$ being a perfect square
145105
What is the sum of all the Fibonacci numbers from 1 to infinity.