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 | 14 |
| 3 | 461 |
| 4 | 2205 |
| 5 | 12161 |
| 6 | 205888 |
| 7 | 2748026 |
| 8 | 25141813 |
| 9 | 257022624 |
| 10 | 3107723264 |
| 11 | 35428053457 |
| 12 | 379567391600 |
| 13 | 4182220329864 |
| 14 | 47242475898249 |
| 15 | 526748427926749 |
| 16 | 5818430376752828 |
| 17 | 64655311668945484 |
| 18 | 721026932221046595 |