Looking back at the original problem, “How many different ways can you arrange the cards in the frame given the following”. The orientation of the frame doesn’t alter that.

BTW, more on domino tiling can be found on Wikipedia: http://en.wikipedia.org/wiki/Domino_tiling

]]>My way, and your way, and his way and her way and their way and theirs, and theirs, Everyone has a different way!

]]>I’d have to say about 10 or so before my creative juices dried up and I just stopped trying.

But in mathematical terms I’m pretty sure David’s right in comment 2.

]]>