25 is the next number that appears in that sequence.
The next number is 4, followed by -2
The next number in the sequence is 18. It's +1, +2, +3, +4, ....
The next number in this sequence is 13112221.
0.1
The sequence is generated using cubes, or n^3. The next number in the sequence will be 4^3, or 256.
1
25 is the next number that appears in that sequence.
The next number is 4, followed by -2
16 is the next squared number.
The next number in the sequence is 18. It's +1, +2, +3, +4, ....
The next number in this sequence is 13112221.
19
0.1
A single number, such as 192113152021235, does not define a sequence.
The next number in the sequence is... 64
For an integral sequence the next number is 6 (add 5 subtract 7 pattern).