What is the rule for this sequence 3 4 6 9 13 18?

Answer 1

The pattern rule is 1,2,3,4

Answer 2

The rule for this sequence appears to be adding consecutive prime numbers. The sequence starts with 3, then adds the next Prime number 2 to get 4. It then adds 3 (the next prime number) to 4 to get 7, then 5 to 7 to get 12, and so on. Each number in the sequence is the sum of the previous number and the next prime number in order.

Answer 3

3 4 6 9 13 18
...1....2....3....4......5