Heptominoes

Had to be done - These are all the 108 heptominoes - with 7 squares each. I started to code them up from the diagram but hit a threshold of effort whereupon I diverted into trying to generate them instead. Turned out that this could be done by modifying Freeman codes but only up to the point where shapes have full holes. The work and the Python script is in my blog post.

http://kitwallace.tumblr.com/post/183942185904/generating-polyominoes