The entire Parcelatories of 4

With 1 parcel there is only 1 addition:
4 = 4

With 2 parcels there are 2 additions:
4 = 1+3
4 = 2+2

With 3 parcels there is 1 addition:
4 = 1+1+2

With 4 parcels there is 1 addition:
4 = 1+1+1+1