First four terms of the sequence represented by the expression n (n-1) - 4

First term is n=1

1 (1-1) - 4

1 (0) - 4

-4

first term is - 4

2nd term

n=2

2 (2-1) - 4

2 (1) - 4

2-4

-2

2nd term is - 2

3rd term

n=3

3 (3-1) - 4

3 (2) - 4

6-4

2

3rd term is 2

4th term

n=4

4 (4-1) - 4

4 (3) - 4

12-4

8

4th term is 8

the first 4 terms are - 4, - 2, 2, 8

That's a strange form but:

n^2-n-4

-4, - 2, 2, 8