1
Input: 3 → [?] → 2, what is the rule? =
2
Input: 5 → [?] → 13, what is the rule? =
3
Input: 8 → [?] → 22, what is the rule? =
4
Input: 1 → [?] → 6, what is the rule? =
6
Input: 9 → [?] → 19, what is the rule? =
7
Input: 7 → [?] → 35, what is the rule? =
8
Input: 2 → [?] → 6, what is the rule? =