I love this video http://www.youtube.com/watch?v=1N6cOC2P8fQ http://www.youtube.com/watch?v=1N6cOC2P8fQ by Sean Day[9] Plott describing Graham's number very wel

I love this video http://www.youtube.com/watch?v=1N6cOC2P8fQ http://www.youtube.com/watch?v=1N6cOC2P8fQ by Sean Day[9] Plott describing Graham's number very well. At least I found that description very easy to follow. Numberphile [1] too has a great explanation, but I still strongly recommend watching Day[9] video because it tells a little bit of history and Sean is very expressive and good speaker so he easily engages viewer. [1] https://www.youtube.com/watch?v=XTeJ64KD5cg https://www.youtube.com/watch?v=XTeJ64KD5cg