You can know that the number of bits in each row is 1, 3, 5, 7, 9.

That is, the nth row has 2n- 1 number.

There are 3 1 digits in line 16, and the digits in the first line 15 are 1+3+5+7+...29=225.

The third number of 16 line is 225+3=228.