On certain classes, such as the Ranger, the base attack table has multiple entries. Example Ranger:
+1
+2
+3
+4
+5
+6/+1
+7/+2
+8/+3
+9/+4
+10/+5
+11/+6/+1
+12/+7/+2
+13/+8/+3
+14/+9/+4
+15/+10/+5
+16/+11/+6/+1
+17/+12/+7/+2
+18/+13/+8/+3
+19/+14/+9/+4
+20/+15/+10/+5
What's the thing about the second, third, and fourth columns?
+1
+2
+3
+4
+5
+6/+1
+7/+2
+8/+3
+9/+4
+10/+5
+11/+6/+1
+12/+7/+2
+13/+8/+3
+14/+9/+4
+15/+10/+5
+16/+11/+6/+1
+17/+12/+7/+2
+18/+13/+8/+3
+19/+14/+9/+4
+20/+15/+10/+5
What's the thing about the second, third, and fourth columns?