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 | 19 |
| 2 | 361 |
| 3 | 1675 |
| 4 | 13759 |
| 5 | 86255 |
| 6 | 612439 |
| 7 | 4105063 |
| 8 | 28280693 |
| 9 | 192317491 |
| 10 | 1315659479 |
| 11 | 8974817871 |
| 12 | 61305336781 |
| 13 | 418503254641 |
| 14 | 2857795269701 |
| 15 | 19511966375659 |
| 16 | 133229220360041 |
| 17 | 909670357985593 |
| 18 | 6211195191847723 |
| 19 | 42409515649083757 |