Figure 1. Sequences of identical digits in the transcendental number e expressed in different bases between base 2 and base 20, and with up to 2000 digits in the numerical expansion

From

Carl Sagan’s Conjecture of a Message in π

Arne Bergstrom

International Journal of Physics. 2014, 2(6), 264-266 doi:10.12691/ijp-2-6-9