Oluf is not the son of Jens Karlsen. This line does not exist.
A document dated February 1., 1594 states that "Oluf Loensen Aas i Fluberg", this is Oluf Landåsen is exchanging property with Jakob Rosenkrantz. The property is Skjak.
Oluf is therefore son of a man called Loen or Lodin, not a son of Jens.