My favourite method for this particular case is to use the shift list component twice once with a 1 and then with a -1, provided you don't wrap the list it will knock the first item off the beginning and then the last one of the end.
Other methods could include using the List item component and provide a series that starts at 1 and is N-2 in length, or Sub List component where you supply a domain from 1 to N-2.
as you saw in the file, i'm working on membranes and pneumatic structures. Do you know any tool for generating cutting pattern of tensile structure? is there any possibility in grasshopper?