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 | 9 |
| 2 | 10 |
| 3 | 15 |
| 4 | 32 |
| 5 | 105 |
| 6 | 490 |
| 7 | 2891 |
| 8 | 20172 |
| 9 | 161293 |
| 10 | 1451534 |
| 11 | 14515215 |
| 12 | 159667216 |
| 13 | 1916006417 |
| 14 | 24908083218 |
| 15 | 348713164819 |
| 16 | 5230697472020 |
| 17 | 83691159552021 |
| 18 | 1422749712384022 |
| 19 | 25609494822912023 |
| 20 | 486580401635328024 |
| 21 | 9731608032706560025 |
| 22 | 204363768686837760026 |