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 | 17 |
| 3 | 138 |
| 4 | 979 |
| 5 | 6755 |
| 6 | 46356 |
| 7 | 317797 |
| 8 | 2178293 |
| 9 | 14930334 |
| 10 | 102334135 |
| 11 | 701408711 |
| 12 | 4807526952 |
| 13 | 32951280073 |
| 14 | 225851433689 |
| 15 | 1548008755890 |
| 16 | 10610209857691 |
| 17 | 72723460248107 |
| 18 | 498454011879228 |
| 19 | 3416454622906669 |
| 20 | 23416728348467645 |