158
One possible sequence is t(n) = 0.5*(19n2 - 7n + 40) for n = 1, 2, 3, ...
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
The next number could be 26 The next number could be 12 - - - - - - - - - The next number that is in the sequence is 12.
a
31. Each number is derived from the sequence minus 6 then plus 17. Cobblestoneplaza.com
To get the next number in the sequence, you simply multiply by 26*2=1212*2=2424*2=4848*2=96
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, ...
The sequence given is formed by the triangular numbers, which are obtained by adding consecutive integers. The next number in the sequence after 20 can be calculated by adding 6 (the next integer after 5, which was added to get 15 to 20). Therefore, the next number is 20 + 6 = 26. So, the next number is 26.
58