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 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 8 |
| 6 | 37 |
| 7 | 36 |
| 8 | 219 |
| 9 | 452 |
| 10 | 3000 |
| 11 | 5652 |
| 12 | 74961 |
| 13 | 126758 |
| 14 | 1371016 |
| 15 | 5653854 |
| 16 | 31440841 |
| 17 | 87796362 |
| 18 | 1319722484 |
| 19 | 2491714134 |
| 20 | 31893717065 |
| 21 | 121274777228 |
| 22 | 832622962686 |
| 23 | 2170594048582 |
| 24 | 34308978981089 |