The next number in the sequence - 5, - 2, 4, 13 is 25. is this conjecture true or false? math

5

-5 + 3 = - 2

-2 + 6 = 4

4 + 9 = 13

13 + 12 = 25 ... this conjecture is true. There is a pattern ... + 3 + 6 + 9 + 12 ... for the next term, u would add 15 ... ur just adding multiples of 3