Generating necklaces and bracelets is fun too, see eg. http://www.sciencedirect.com/science/article/pii/S0304397512010547 http://www.sciencedirect.com/science/a

Generating necklaces and bracelets is fun too, see eg. http://www.sciencedirect.com/science/article/pii/S0304397512010547 http://www.sciencedirect.com/science/article/pii/S0304397512...