The number of shaded rectangles in Picture N follows a pattern. Find the rule for the number of shaded rectangles.

Let's analyze the pattern based on the given table values and the visual representations.

The table provides the number of shaded rectangles for Picture 1, 2, and 3:

• Picture 1: 4 shaded rectangles
• Picture 2: 8 shaded rectangles
• Picture 3: 16 shaded rectangles

Let's find a rule that fits these numbers.
Let $N$ be the picture number and $S_N$ be the number of shaded rectangles.
$S_1 = 4$
$S_2 = 8$
$S_3 = 16$

This sequence (4, 8, 16) suggests