It appears that the number sequence is like this:
The first two numbers are the same, 1 1, then they go up by two, 1 1 (3) and down by one 1 1 3 (2), then up again by two, 1 1 3 2 (4) and again by two, 1 1 3 2 4 (6) we then see down by one again, 1 1 3 2 4 6 (5) and now up by twenty 1 1 3 2 4 6 5 25.
After the number stops, it's suppose to start over again,
25 25 27 26 28 30 29 49
Though in some cases the number sequence may be written...
1 1 3 2 4 6 5 25 25 27 26 28 30 29 49
Also could be written as:
2 2 4 3 5 7 6 26
3 3 5 4 6 8 7 27
* * * * *
There are infinitely many possible rules that will generate this sequence. It is possible to fit a polynomial of order 7 that will fit these 8 values.
A simpler rule seems to apply her, though and that is a loop of three operations: {square, +2, -1}
27
25
The number which best completes the sequence below is:1 1 3 2 4 6 5 25 ?
27
26
27
27
26
15
27
This sequence appears to follow the relation *3, /2 , +1, *3, /2, +1,........ By applying the above relation to the existing numbers we see that 24 + 1 = 25. Hence we apply the *3 logic to 25. We obtain 25 * 3 = 75 as the next number in the sequence.
What number best completes the sequence 1 1/2 5 10 1/2 18
26