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 | 94 |
| 3 | 1678 |
| 4 | 19854 |
| 5 | 186987 |
| 6 | 1548002 |
| 7 | 11947350 |
| 8 | 87562135 |
| 9 | 605431820 |
| 10 | 3905165468 |
| 11 | 23355599964 |
| 12 | 129475795828 |
| 13 | 667503759881 |
| 14 | 3215875683718 |
| 15 | 14555156486463 |
| 16 | 62204964640341 |
| 17 | 252211338710097 |
| 18 | 974245904884957 |
| 19 | 3598868691539578 |