My guess: 2.5
26 As far as I can tell the sequence is +10,-5,+10,-5.
215
This is a peculiar number sequence which follows the following rule: +7, -4, +8, -3, +9, -2... The next few functions would be +10, -1, +11, -0 And thus the next few numbers in the sequence would be 17+10=27, 27-1=26, and so on. The sequence in total goes 2, 9, 5, 13, 10, 19, 17, 27, 26, 37, 37.
It is 26 followed by 31
8
The next number could be 26 The next number could be 12 - - - - - - - - - The next number that is in the sequence is 12.
a
To get the next number in the sequence, you simply multiply by 26*2=1212*2=2424*2=4848*2=96
31. Each number is derived from the sequence minus 6 then plus 17. Cobblestoneplaza.com
My guess: 2.5
26 As far as I can tell the sequence is +10,-5,+10,-5.
215
This is a peculiar number sequence which follows the following rule: +7, -4, +8, -3, +9, -2... The next few functions would be +10, -1, +11, -0 And thus the next few numbers in the sequence would be 17+10=27, 27-1=26, and so on. The sequence in total goes 2, 9, 5, 13, 10, 19, 17, 27, 26, 37, 37.
It is 26 followed by 31
250 The sequence is t(n) = (22n5 - 381n4 + 2452n3 - 7191n2 + 9538n - 4416)/24 for n = 1, 2, 3, ...
58