Thank you so much for posting this. I googled it because I had these dreams in my youth, and now that I'm a grown man (39), sometimes, I can still feel the sensation of the dreams in certain situations. I think mine started at age 10-12, I don't remember having them before. The first I can recall, was horrifying, and even after I woke up, I literally ran across my house screaming and terrified because 'numbers' where chasing me.
That time, as well as others, I felt as if been chased by a mathematical pattern on numbers that multiplied, and where suddenly chasing me, as I ran across the house trying to escape from this. In later dreams, I was caught in some sort of need or obliged to follow mathematical patterns (multiply, or divisions) at very fast paces, and at some quick point, be completely overwhelmed by my impotence to process the patterns. Complete cerebral overload as someone described above. -- 2-4-8-16-32-64 .....1024-2048.. and so on, all in a couple of seconds.. Dizziness would enter, light headedness, anxiety, FRUSTRATION that would make me want to cry.
I have also had a second type of dreams, which are not associated with numbers, but which leave me with the same *sensation* of frustration than the 'number dream'.
This dream is about the contrast between beauty, and ugly. I will start dreaming of someone (could be me) singing beautifly and peacefuly, with such grace.. everyone smiling, such harmony... only for that same person to start singing horribly, making stupid noises, which make everyone frustrated and sad. -And then the person will start singing beautifly again, and the pattern will repeat itself again, until I wake up lightheaded, dizzy, and wanting to cry.
That same dream can happen with contrasts of all sorts. Big - small, beautiful - horrible, perfect - defective.

Although this last type doesn't have much to do with numbers, the dreams are similar, as they start as a *sensation* which not only continues even way after I wake up, but the sensation can also even start while being awake. In which case I will only feel the frustration and dizziness and light headedness, but not get totally involved in the dream.

As related info, I can say that I am also quite normal in other aspects of my life. Healthy, professional, don't use drugs or alcohol. Im a perfectionist, and I think these dreams are caused by a similar anxiety than the one that causes perfectionism.

The thing is, I'm in this blog now because now that I'm a father, my 12 yr old daughter gets the exact same dreams as I did. She woke up yesterday 2 hours after going to bed with one of those. So I googled it, and here I am, speaking to the void for the first time about them. Thx so much for sharing, and I'll post what my daughter writes about them when she finishes. Cheers to all.