We claim the ornamental design for a pan, as shown and described.
FIG. 1 is a perspective view of a pan, showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view of thereof; and,
FIG. 7 is a bottom view thereof.
The ornamental design that is claimed is shown in solid lines in the figures. The dot-dash broken lines shown in the figures depict the boundaries of the claim and form no part of the claimed design. All other broken lines depict portions of the pan that form no part of the claimed design. The pan is shown with symbolic breaks in its length. The appearance of any portion of the pan between the break lines forms no part of the claimed design.