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