Here are the first 5 terms of a quadratic sequence.
6 9 16 27 42
Find an expression, in terms of nnn, for the n n\,nth term of this sequence. Give your answer in the form an2+bn+can^2+bn+can2+bn+c.
201 exam-style questions on OCR GCSE Maths The Nth Term of a Quadratic Sequence. Each one has a worked solution and a mark scheme showing where the marks go.