The next number is -21
36
21
31. The pattern is likely xn = xn-1 + n + 6.
This is the series of square numbers, (16= 4*4). The next number is 5*5=25.
The next number is -21
36
21
21
21.
21
If the numbers are 64 16 4 1 and 1/4 then the next number is 1/16 because each number is being divided by 4
26
It appears that they are increasing by odd numbers of 3 5 7 So the next number should be 16+9 = 25
31. The pattern is likely xn = xn-1 + n + 6.
This is the series of square numbers, (16= 4*4). The next number is 5*5=25.
Well, the pattern is the previous number plus the current number. So the next three numbers would be 21, 34, 55...