This number is a prime.
There are 2683 different shapes formed by bending (+ or - 90 degrees at each bend) a piece of wire of length less than or equal to 15 in the plane. [Post]
(There are 2 curios for this number that have not yet been approved by an editor.)
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell