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 | 5 |
| 2 | 3 |
| 3 | 2 |
| 4 | 2131 |
| 5 | 1531 |
| 6 | 33301 |
| 7 | 16651 |
| 8 | 15514861 |
| 9 | 857095381 |
| 10 | 205528443121 |
| 11 | 1389122693971 |
| 12 | 216857744866621 |
| 13 | 758083947856951 |
| 14 | 107588900851484911 |
| 15 | 69257563144280941 |