This geometric sequence reference table shows the nth term for a range of first term (a) values, assuming a common ratio (r) of 3 and a term number (n) of 5. Every figure is computed with the same engine that powers our Geometric Sequence Calculator, so the numbers are exact.
| First term (a) | nth term | Sum of first n terms |
|---|---|---|
| 0.5 | 40.5000 | 60.5000 |
| 1 | 81.0000 | 121.0000 |
| 1.5 | 121.5000 | 181.5000 |
| 2 | 162.0000 | 242.0000 |
| 3 | 243.0000 | 363.0000 |
| 4 | 324.0000 | 484.0000 |
| 6 | 486.0000 | 726.0000 |
| 10 | 810.0000 | 1,210.0000 |
| 14 | 1,134.0000 | 1,694.0000 |
| 20 | 1,620.0000 | 2,420.0000 |
How to use this table
Find the row closest to your first term (a) and read across to the nth term. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Geometric Sequence Calculator for a precise answer.
Need a value that is not in the table? — the Geometric Sequence Calculator does it instantly, for free, with the formula and a worked example built in.
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