> [ π, e^a where a>0, ln(a) where a!=0 and a!=1, ]
e (Euler) https://en.wikipedia.org/wiki/E_(mathematical_constant)
Pi (Archimedes,) https://en.wikipedia.org/wiki/Pi
Avogadro constant: https://en.wikipedia.org/wiki/Avogadro_constant
Approximations of Pi: https://en.wikipedia.org/wiki/Approximations_of_%CF%80
List of representations of e: https://en.wikipedia.org/wiki/List_of_representations_of_e
Four dimensional space, 4D, Minkowski (SR), Einstein (GR) https://en.wikipedia.org/wiki/Four-dimensional_space
Four vector: https://en.wikipedia.org/wiki/Four-vector
Four velocity: https://en.wikipedia.org/wiki/Four-velocity
Four gradient: https://en.wikipedia.org/wiki/Four-gradient
List of mathematical constants: https://en.wikipedia.org/wiki/List_of_mathematical_constants
You can write a script to find other integer/integer approximations for pi and other transcendental numbers like e.