This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 15 |
| 3 | 208 |
| 4 | 2389 |
| 5 | 24845 |
| 6 | 243697 |
| 7 | 2348885 |
| 8 | 22837227 |
| 9 | 226507501 |
| 10 | 2285904554 |
| 11 | 23239957877 |
| 12 | 235731610792 |
| 13 | 2372897841904 |
| 14 | 23686630752065 |
| 15 | 235058927877399 |
| 16 | 2327977363798607 |