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 | 52 |
| 2 | 1053 |
| 3 | 12376 |
| 4 | 100776 |
| 5 | 627912 |
| 6 | 3187041 |
| 7 | 13748020 |
| 8 | 51949755 |
| 9 | 175847880 |
| 10 | 542393670 |
| 11 | 1544927904 |
| 12 | 4107092288 |
| 13 | 10278624864 |
| 14 | 24388573014 |
| 15 | 55188666312 |
| 16 | 119696471453 |
| 17 | 249869263644 |
| 18 | 503865726155 |
| 19 | 984563860280 |
| 20 | 1869304764600 |
| 21 | 3456658569000 |
| 22 | 6238533257775 |