Lucas Numbers

I came across this video by chance, though I love the Numberphile guys (and gals) and their work. It explains the concept of Lucas numbers, which are directly related to Fibonacci numbers, but are pretty intriguing in an unexpected way. I won't spoil the fun, but do take some time to watch - you will be surprised by what you learn, though I do take exception to his claim that Lucas Numbers are actually better than Fibonacci. Call me biased...

Lucas Numbers - from Numberphile's YouTube Channel 

featuring Matt Parker