Question 185104
3, 6, 11, 18, 27, ...


is same as


1+2, 4+2, 9+2, 16+2, 25+2, ...


1^2+2, 2^2+2, 3^2+2, 4^2+2, 5^2+2, ...


see the pattern?


nth term: n^2+2