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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 28 |
| 6 | 173 |
| 7 | 201 |
| 8 | 1178 |
| 9 | 2557 |
| 10 | 13963 |
| 11 | 16520 |
| 12 | 113083 |
| 13 | 581935 |
| 14 | 695018 |
| 15 | 1276953 |
| 16 | 1971971 |
| 17 | 3248924 |
| 18 | 203405259 |
| 19 | 206654183 |
| 20 | 410059442 |
| 21 | 616713625 |
| 22 | 1026773067 |
| 23 | 5750578960 |
| 24 | 35530246827 |
| 25 | 41280825787 |