Number of pairs of integers $(a,b)$ with $a^2+b^2=n$ for a constant $n$
50615
Expressing a Non Negative Integer as Sums of Two Squares
45454
Pairs of $(p,q)$ such that $p^2 + 1 = 2 q^2$?
20834
Integer solutions to $c=a^2-b^2$
85449
Show a,b,c congruences when $a^2+b^2=c^2$
139426
Proving $ \binom n 0 ^2 + \binom n 1 ^2 + \dots + \binom n n ^2 = \binom { 2n} n $ without induction
15626
Relations of a~b iff b = ak^2
48838
Proving the number of $n$ length binary strings with no consecutive $1's$ $b_n$ is equal to $b_{n-1} + b_{n-2}$
96185
Solutions of $x^2+y^2+z^2 = n$ in $\mathbb{Z}_2$.
112575
Finding integer solutions of $m^2-n^5 = m - n$
94327
Cubic Diophantine with two variables
37808
Show that $\gcd(a^2, b^2) = \gcd(a,b)^2$
57221
counting the number of elements in a conjugacy class of $S_n$
86219
Integers of the form $x^2-ny^2$
91113
$ \exists a, b \in \mathbb{Z} $ such that $ a^2 + b^2 = 5^k $
144821
Number of ordered pairs of subsets
149841
Find the number of integer pairs 0 ≤ a, b ≤ 100 such that a^20 ≡ b^50 (mod 101). Need help with understanding solution
114404
For which positive integer values of $n$ does $a|mn-b?$