Table 3.

The 0th–6th terms of the unnormalized one-dimensional Chebyshev polynomial.

Term	Expression	Aberration
0	1	Piston
1	m	Tilt
2	$2m^2-1$	Defocus
3	$4m^3-3m$
4	$8m^4-8m^2+1$
5	$16m^5-20m^3+5m$
6	$32m^6-48m^4+18m^2-1$