Some of the functions for n=2.

OR function    

						|	0	1
_____	_____	___	_____		____	___	____	____
0	0	|	0		0	|	0	1
0	1	|	1		1	|	1	1
1	0	|	1
1	1	|	1

0111=7₁₀

Rules to remember

These rules fully  characterize the function.