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Max Alekseyev
  • Member for 8 years
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10 votes
Accepted

Sufficiently large integers can be partitioned into squares of distinct integers whose reciprocals sum to 1.

9 votes
Accepted

Explanation of OEIS:A000236 - Residue Classes

8 votes
Accepted

Number of labeled Abelian groups of order n

8 votes
Accepted

$2n+1$ Subsets whose cardinality is a multiples of 6

7 votes

$\prod_{i=1}^{n} (3 +\frac{1}{a_i})$ cannot be a power of 2 if $a_i \equiv \pm 1 \pmod 6$

6 votes

Are there infinitely many nonnegative integers not of the following four forms?

5 votes
Accepted

Primes made from alternating factorials

5 votes
Accepted

When is the number of areas obtained by cutting a circle with $n$ chords a power of $2$?

4 votes
Accepted

Is there another pair of consecutive primes with this property?

4 votes

Binary strings with exactly $n$ ones but without 000 or 111

4 votes
Accepted

Exponential diophantine equation $2^x+7^y=9^z$.

4 votes
Accepted

Finitely many palindromes in two consecutive number bases, for fixed and distinct numbers of digits

3 votes
Accepted

Is $\ 101\ $ the only solution of $\ 2^{n-1}\equiv 203\mod n\ $?

2 votes

What algorithm is a good to search a lotto design?

2 votes
Accepted

What are the non-negative integers of this form?

2 votes

How often does a one-dimensional lazy random walk end at the origin?

2 votes
Accepted

The sum over inverses of n positive real numbers, which is less or equal 1, yields a convex set

2 votes

Calculating large Bell number modulo a composite number

2 votes

Counting trivial cases of combinatorial functions

2 votes

Hard system in integers related to natural number representations

2 votes

Counting special paths on a certain rectangle integer grid (binary matrix)

2 votes
Accepted

How to simplify this combinatorial summation?

2 votes
Accepted

Distributing groups of objects into boxes

1 vote

How to compute the coefficients of this generating function

1 vote
Accepted

Construction of a vector consisting of entries with a peculiar pattern

1 vote
Accepted

Sum involving the set of all possible combinations with at most two repetitions

1 vote

Show that $\dfrac{k}{2^{2k-2}}=(\prod_{j=1}^k \sin \frac{\pi j}{2k})^2$ for $k \in \mathbb{N}$.

1 vote

exponents of rational numbers close to integers

1 vote

A property involving two commuting 3-by-3 matrices with non-negative entries

0 votes

How do I solve congruences with two variables and distinct moduli?