0.1
The next number is 48.
121
Each is half of the previous number, so 6.25 will be next.
A single number, such as 256196144100643616 does not represent a sequence.
If the sequence is determined by 100 - 70 = 30, then the next number is 10.
0.1
500
The next number is 48.
121
500
Do you mean the next number or the sequence equation. And there isn't a solid patter, there's to much ambiguity to determine a logical next number.
A sequence never ends. The next number in this one is 7 .
Each is half of the previous number, so 6.25 will be next.
49
144
A single number, such as 256196144100643616 does not represent a sequence.