The ornamental design for a roboticlawnmower having inwardly indented portions along a periphery thereof, as shown and described.
FIG. 1 is a perspective front view of a robotic lawnmower having inwardly indented portions along a periphery thereof according to our design;
FIG. 2 is a front end view thereof;
FIG. 3 is an enlarged perspective front view thereof;
FIG. 4 is an enlarged front end view thereof; and,
FIG. 5 is a top view thereof.
The broken lines shown herein are portions of the robotic lawnmower having inwardly indented portions along a periphery thereof and form no part of the claimed design.