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 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 43 |
| 5 | 48 |
| 6 | 53 |
| 7 | 3301 |
| 8 | 48515 |
| 9 | 348422 |
| 10 | 406665 |
| 11 | 1200207 |
| 12 | 6698641 |
| 13 | 190821326 |
| 14 | 2292141445 |
| 15 | 257125021372 |
| 16 | 5843866639660 |
| 17 | 45173327533483 |
| 18 | 46312809996150 |
| 19 | 59358981837795 |
| 20 | 129408997210988 |
| 21 | 1450344802530203 |
| 22 | 5710154240910003 |