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Combinatorics
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Demonstrations 201  220 of 245
The Number of Binomial Coefficients Divisible by a Fixed Power of a Prime
Stirling's Triangles
Canonical Polygons
Intersecting Lines in All Possible Ways
Lengths of Permutation Cycles
Cycles in Random Sample Permutations
Bit Plane Effects
Stairstep Interpretation of Catalan Numbers
Permuted Tabulation of Vanishing Determinants
Small Set Partitions
Flexible Galton Board
Permuted Projections of Nested Arrays
Direct Control for Hex Machine
Color Cube 2x2x2 Puzzle
Delannoy Number Carpet
Counting Paths through a Grid
Permutations in Lexicographic Order
Christmas Stocking Identity
Diagonals of Polyhedra
Polygon Triangulations
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