What is the 25th term of the sequence 3, 6, 11, 18, ... ?
nth term is:
an = n^2 + 2
a1 = 1^2 + 2 = 1 + 2 = 3
a2 = 2^2 + 2 = 4 + 2 = 6
a3 = 3^2 + 2 = 9 + 2 = 11
a4 = 4^2 + 2 = 16 + 2 = 18
a25 = 25^2 + 2 = 625 + 2 = 627
an = n^2 + 2
a1 = 1^2 + 2 = 1 + 2 = 3
a2 = 2^2 + 2 = 4 + 2 = 6
a3 = 3^2 + 2 = 9 + 2 = 11
a4 = 4^2 + 2 = 16 + 2 = 18
a25 = 25^2 + 2 = 625 + 2 = 627