This arithmetic series sum reference table shows the sum of the series for a range of first term (a) values, assuming a common difference (d) of 3 and a number of terms (n) of 5. Every figure is computed with the same engine that powers our Arithmetic Series Sum Calculator, so the numbers are exact.
| First term (a) | Sum of the series | Last term |
|---|---|---|
| 0.5 | 32.5000 | 12.5000 |
| 1 | 35.0000 | 13.0000 |
| 1.5 | 37.5000 | 13.5000 |
| 2 | 40.0000 | 14.0000 |
| 3 | 45.0000 | 15.0000 |
| 4 | 50.0000 | 16.0000 |
| 6 | 60.0000 | 18.0000 |
| 10 | 80.0000 | 22.0000 |
| 14 | 100.0000 | 26.0000 |
| 20 | 130.0000 | 32.0000 |
How to use this table
Find the row closest to your first term (a) and read across to the sum of the series. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Arithmetic Series Sum Calculator for a precise answer.
Need a value that is not in the table? — the Arithmetic Series Sum Calculator does it instantly, for free, with the formula and a worked example built in.
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