Try this web site.
The On-Line Encyclopedia of Integer Sequences
Try this web site.
The On-Line Encyclopedia of Integer Sequences
There are, of course, really an infinite number of possibilities, but I have come up with a pattern for this last one:
Start with 5.
Subtract 3.
Add 4
Subtract 3.
Add 6
Subtract 3.
So I would say that the next two lines would be
Add 8
Subtract 3.
Then
Add 10
Subtract 3.
etc.
-Dan