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 | 3 |
| 2 | 31 |
| 3 | 379 |
| 4 | 8861 |
| 5 | 86183 |
| 6 | 886183 |
| 7 | 8861837 |
| 8 | 98861837 |
| 9 | 929148091 |
| 10 | 3098861837 |
| 11 | 83098861837 |
| 12 | 183098861837 |
| 13 | 8618379067153 |
| 14 | 28724068919291 |
| 15 | 830988618379067 |
| 16 | 7906715377675267 |
| 17 | 12897495334688117 |
| 18 | 675267450287240689 |
| 19 | 7675267450287240689 |
| 20 | 83098861837906715377 |