Line L29 from track 2 at Östra station to Näsby park 13:10,
13:40,14:10 or 14:40 to be at Näsby park 13:30,14:00,
14:30 or 15:00 and walk about 50 meters to the left to
the OnInn at 15:10 or earlier and you should preferably
be at the front of the train...
And when you are going back the train leaves at 8 and 38 minutes
past from Näsby park to be at Östra station at 28 and 58 minutes past every hour...