1. Work out the 11^{th} term of the sequence 6, 9, 14, 21, 30, ...
2. Work out the 15^{th} term of the sequence −3, 0, 5, 12, 21, ...
3. Work out the 17^{th} term of the sequence −5, 1, 11, 25, 43, ...
4. Work out the 9^{th} term of the sequence 14, 20, 30, 44, 62, ...
5. Work out the 20^{th} term of the sequence 10, 19, 34, 55, 82, ...
6. Work out the 19^{th} term of the sequence −9, 0, 15, 36, 63, ...
7. Work out the 21^{st} term of the sequence 14, 23, 38, 59, 86, ...