In the picture (1), black: 1 white: 6.

The second picture, black: 2 white: 10.

The third picture, black: 3 white: 14.

The fourth picture, black: 4 white: 18.

In the (n) th picture, black: n white: 4n+2.

The first pattern has 6 white bricks;

The second pattern has white bricks 6X2-2X(2- 1)= 10 (block);

The third pattern has white brick 6X3-2X(3- 1)= 14 (block); ……

The fourth pattern has white brick 6X4-2X(4- 1)= 18 (block);

There is a white brick 6n-2(n- 1)=(4n+2) (block) in the nth pattern.