:nth-last-child(odd)
:nth-last-child(2n+1) - same as odd
:nth-last-child(even)
:nth-last-child(2n) - same as even
:nth-last-child(2)
:nth-last-child(3n)
:nth-last-child(3n+1)
:nth-last-child(3n-1)
:nth-last-child(-n+3)
:nth-last-child(n)
:nth-last-child(-n) - same as n
:nth-last-child(+n) - same as n
:nth-last-child(0n+1)
:nth-last-child(n+2):nth-last-child(-n+3)
:nth-last-child(-5n+3) - Acid3
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13 +
    14
    15
 
:nth-last-child(3n+1 of .special)
    1
    2
    (Ignored)
    3 +
    (Ignored)
    4
    (Ignored)
    (Ignored)
    5
    6 +