27, 26, 37, 37
There are two sequences mixed in together
2+7=9 9-4=5
5+8=13 13-3=10
10+9=19 19-2=17
This first set goes up by 1 each time.
The second set goes down by 1 each time.
17+10=27 27-1=26
26+11=37 37-0=37
27 BUT, as far as I can tell, it does not complete the sequence which can continue further.
2 9 5 13 10 19 17
27
27. But that continues the sequence, it does not complete it.
One.
18
that best completes the sequence 2 9 5 13 10 19 17 is 27.
2 5 9 10 13 17 19
The sequence n plus 3 can be represented as 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, ... The 10th term of this sequence can be found by substituting n = 10 into the formula, which gives us 10 + 3 = 13. Therefore, the 10th term of the sequence is 13.
10 (between 7 and 13)
The next number in the sequence is 27.
18