Note that 6 is 4 plus 2,
10 is 6 plus 4, or 6 plus 2^2
16 is 10 plus 6
Given the first term, 4, we find the second term by adding 2 to 4, obtaining 6.
Given the 2nd term, 6, we find the third term by adding 4 to 6, obtaining 10.
Given the 3rd term, 10, we find the fourth term by adding 6 to 10: 16
What's the next term? Find the fifth term by adding 8 to 16: 24 (answer)