How do I find and enumerate the number of perfect matchings in directed complete graphs?
33603
How to get all Perfect or Near-Perfect Matchings of a graph
33822
Is there a monoid structure on the set of paths of a graph?
83872
Isomorphisms for graphs with loops and multiple edges
142477
Closed-form expression for the number of $k$-permutations of length $n$. Duplicates allowed!
36038
How to generate all possible Venn diagrams (with the case below) efficiently?
142103
find all self-complementary graphs on five vertices
27273
Count the number of topological sorts for poset (A|)?
17086
The number of (non-equal) forests on the vertex set V = {1, 2, ...,n} that contains exactly 2 connected components is given by
3217
Construction of uncountably many non-isomorphic linear (total) orderings of natural numbers
143573
Problem (1.8) A Path to Combinatorics Solution Verification.
143427
Counting existing permutations in R
120684
Calculating the number of possible paths through some squares
100832
Number of binary trees with $N$ nodes
49193
Constructing a graph from a degree sequence
79631
Find a graph on eight vertices with a pair of pseudosimilar vertices
59831
How to relate combinatorial proof to bipartite graphs?
150786
Directed Graph Processing in Java