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 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 7 |
| 6 | 33 |
| 7 | 35 |
| 8 | 212 |
| 9 | 449 |
| 10 | 2991 |
| 11 | 5651 |
| 12 | 74919 |
| 13 | 126757 |
| 14 | 1370979 |
| 15 | 5653844 |
| 16 | 31440622 |
| 17 | 87796361 |
| 18 | 1319721998 |
| 19 | 2491714133 |
| 20 | 31893714060 |
| 21 | 121274777190 |
| 22 | 832622957033 |
| 23 | 2170594048581 |
| 24 | 34308978905916 |