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 | 3 |
| 4 | 3 |
| 5 | 9 |
| 6 | 21 |
| 7 | 46 |
| 8 | 95 |
| 9 | 273 |
| 10 | 363 |
| 11 | 731 |
| 12 | 3088 |
| 13 | 6247 |
| 14 | 24152 |
| 15 | 46012 |
| 16 | 319511 |
| 17 | 1141923 |
| 18 | 2138064 |
| 19 | 7346404 |
| 20 | 13530107 |
| 21 | 45297804 |
| 22 | 271446312 |