Efficiently finding all sums of squares that sum to a given number.
140433
The number of ways of writing an integer as a sum of two squares
50615
Expressing a Non Negative Integer as Sums of Two Squares
18932
Squares in arithmetic progression
51671
lower bounding logarithm of sums
80671
Product of sums of square is a sum of squares.
74471
Sum of numbers at vertex/face of cube
80458
How to efficiently find the largest perfect square dividing a given large integer?
31970
Alternating sum of squares of binomial coefficients
70354
Find the sum of all the multiples of 3 or 5 below 1000
43459
Sum over all non-evil numbers
137109
Evaluating a summation of inverse squares over odd indices
66216
Squares, Cubes and Prime numbers
130851
Squaring the plane, with consecutive integer squares. And a related arrangement
149481
Number theory counting sums of squares modulus
143540
How to prove this decomposition of sum of squares?
94902
Simplifying a geometric sum
67899
Integer squares of the form $x^4+x^3+x^2+x+1$