The Sixth Root of Ten

Tired:

Exponent × 6	Approximate Result
0	1
1	1.5
2	2
3	3
4	5
5	7
6	10

Wired:

Exponent × 6	Approximate Result
0	1.0
1	1.5
2	2.2
3	3.2
4	4.6
5	6.8
6	10

This more-accurate series removes inconsistencies without significantly increasing complexity.