What is the formula for the nth term of this sequence:

Question

2, 6, 12, 20...

Answer 1

2 , 6 , 12 , 20...

n = 1

a1 = 2 = 1 + 1 = 1 ^ 2 + 1 = n ^ 2 + n

n = 2

a2 = 6 = 4 + 2 = 2 ^ 2 + 2 = n ^ 2 + n

n = 3

a3 = 12 = 9 + 3 = 3 ^ 2 + 3 = n ^ 2 + n

n = 4

a3 = 20 = 16 + 4 = 4 ^ 2 + 4 = n ^ 2 + n

an = n ^ 2 + n

Answer 2

what are the next 2 term of the arithmetic sequence below
6,12,18, , ,