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 | 2 |
| 2 | 16 |
| 3 | 98 |
| 4 | 643 |
| 5 | 4047 |
| 6 | 22714 |
| 7 | 139341 |
| 8 | 794118 |
| 9 | 4654884 |
| 10 | 27655332 |
| 11 | 162017453 |
| 12 | 985389943 |
| 13 | 5963777274 |
| 14 | 36963453329 |
| 15 | 232521285314 |
| 16 | 1479703961900 |
| 17 | 9627524117464 |