Deleted my livejournal!

[dtm]

Okay, I've gone and deleted my livejournal. I don't know if I'm going to resume blogging, but if I do it'll be here and not there.

In the meantime, here's a cute little result about the sum of Fibonacci numbers that I worked out while answering a question from a friend's child:

$$\sum _{j=0}^n{F}_j=F_{n+2}$$

(In case the MathML doesn't work for you, that's \sum_{j=0}^n F_j = F_{n+2})

(Using the convention that F₀=0 and F₁=F₂=1)