Question 983064
This is an arithmetic series with +3 being the common factor.
There is a difference of 108 between 101 and -7
That divided by 3=36.
The first term is added, so there are 37 terms.

-7,-4,-2 are the three negative ones.
2,5,8,11,14,17,20 are 7 terms.
23 to 50 are 10 more
53 to 80 are 10 more
83,86,89,92,95,98,101 are the last 7
Those are the 37 terms.