27
27 BUT, as far as I can tell, it does not complete the sequence which can continue further.
One.
27. But that continues the sequence, it does not complete it.
2 5 9 10 13 17 19
that best completes the sequence 2 9 5 13 10 19 17 is 27.
18
The next number in the sequence is 27.
The number after 17 is 27. 2+7 = 9 9 - 4 = 5 5 + 8 = 13 13 - 3 = 10 10 + 9 = 19 19 - 2 = 17 17 + 10 = 27
27
twenty-seven.
35