The geocache cannot be found at the listed coordinates.
Ola narr is the old ski jump which you will find in this park and nearby the pin. The exact pin represents a beautiful viewpoint over Oslo. You can look over the inner city and see the Oslo fjord.
To find the geocache you first have to solve the next six puzzles. You only need to use basic arithmetic operations for real numbers. Good luck solving them.
You can find the cache at the following coordinates: N 59° 55.ABC E 010° 46.DEF.
If you believe that you found another possible solution, please send me a personal message.