Crockford's hanoi function (from "The Good Parts")
49802
How does recursive algorithm work for Towers of Hanoi?
43962
Penguin Brainteaser : 321-avoiding permutations
5448
Finding the closure of some subsets of the ordered square
77210
Zorn's Lemma and Posets
107964
Simple combinatorics problem.
40635
Finding Maximum value of consecutive positive integers with constraints
92147
Coin sequence paradox from Martin Gardner's book
31340
Concurrent lines proof for a regular 18-gon
86064
Argument completions for user-defined functions
91485
Finding an uncountable chain of subsets the integers
73050
Explanation of the binomial theorem and the associated Big O notation
63571
The Mississipi counting problem, this time in circle
122786
C: The Math Behind Negatives and Remainder
125811
Recognizing special cases of a defined function for permuted arguments
138178
Proving the number of iterations in the Euclidean algorithm
113953
Circular permutations with indistinguishable objects
129163
Showing that every positive integer can be represented in this form