Rated
Mar 27 2006
•
215 reviews
•
mathematics
• numberspiral.com

From th page:Number spirals are very simple. To make one, we just write the non-negative integers on a ribbon and roll it up with zero at the center. The trick is to
arrange the spiral so all the perfect squares (1, 4, 9, 16, etc.) line up in a row on the right side.