What is the nth term rule of the quadratic sequence - 5,-3,3,13,27,45,67

Answer: 123

Step-by-step explanation: You start by adding 2. After that, you add 4 to two, which is six, and add six. After six you add ten, and so on. So you would eventually get to 93, the eighth term, where you would then add 30 to get 123.