UPPDATERA OCH NER
Binary Pi http://www.befria.nu/elias/pi/binpi.html
a pi binary form
pi-and-e-in-binary http://www.exploringbinary.com/pi-and-e-in-binary/
pi = 11.0010010000111111011010101000100010000101101000110000100011010011...
wp pi https://sv.wikipedia.org/wiki/Pi
https://upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Pi-unrolled-720.gif/250px-Pi-unrolled-720.gif
Wallis product https://en.wikipedia.org/wiki/Wallis_product