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 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 60 |
| 5 | 22 |
| 6 | 45 |
| 7 | 820 |
| 8 | 651 |
| 9 | 214 |
| 10 | 4200 |
| 11 | 8401 |
| 12 | 6903 |
| 13 | 2917 |
| 14 | 48360 |
| 15 | 86722 |
| 16 | 63555 |
| 17 | 270130 |
| 18 | 441261 |
| 19 | 882424 |
| 20 | 6758400 |
| 21 | 2517901 |
| 22 | 4034913 |
| 23 | 8068837 |
| 24 | 61277760 |
| 25 | 23445532 |
| 26 | 46880175 |
| 27 | 827712430 |
| 28 | 654534861 |
| 29 | 219078634 |
| 30 | 4281473700 |
| 31 | 8463847411 |
| 32 | 6927694923 |
| 33 | 2954399857 |