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Demonstrations 81  100 of 244
The Routing Problem
SelfAvoiding Paths through a Lattice
Eulerian Numbers versus Stirling Numbers of the First Kind
Two Types of Hexagonal Polyominoes Counted by Area and Number of Columns
How Many Right Triangles Can You Find?
Number of Handshakes
Stirling Numbers of the Second Kind and Nonattacking Rooks
U.S. City Tours
Isomorphic Types on Graphs: 1Neighborhood Random Grid Graphs
Isomorphic Types on Graphs: 1Neighborhood Random Graphs
Isomorphic Types on Graphs: 1Neighborhood Random Tree Graphs
Folding a 2Śn Sheet of Labeled Stamps
Proving Euler's Polyhedral Formula by Deleting Edges
Open Meanders
LittlewoodOfford Problem
Generating Permutations by a Sequence of Transpositions
Set Partitions Match Restricted Growth Functions
The Number of Partitions into Odd Parts Equals the Number of Partitions into Distinct Parts
Tamari Lattice
The Birthday Problem and Some Generalizations
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