So, I was on facebook just a few minutes ago and saw Peter posting this:
Yeah, I thought it was awesome too. I quickly asked for permission to re-post, because I was sure everyone would want to see.
He says it's the character of the "Ch" sound, and the number 16^3 (or 4,096 in our number system.) Amazing artwork here by Isaac Stewart.
Anyone else super excited after seeing this? I know I am.