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Nice sequence of four numbers . . .
Thank you for sharing with us . . .
What help do you need ( if any . . . ) ?
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Comment from student: What will be next series n steps
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My responce: I do not understand what is written in your comment.
But if you want to ask "What will be next number ?", then I have TWO answers for you:
1. Any number can be. For example, 133, 944, -2, 3.14, 
and so on.
2. In Math, such question makes no sense until the pattern is not defined.
Guessing patterns is not the service we provide at this forum.
For such purpose, please find ANOTHER site, where people guess puzzles.
"Next door, please . . . ".
Good luck and have a nice day . . .
