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 | 22 |
| 3 | 223 |
| 4 | 1344 |
| 5 | 5727 |
| 6 | 19193 |
| 7 | 54046 |
| 8 | 133476 |
| 9 | 297633 |
| 10 | 611644 |
| 11 | 1175845 |
| 12 | 2138500 |
| 13 | 3711279 |
| 14 | 6187767 |
| 15 | 9965276 |
| 16 | 15570232 |
| 17 | 23687409 |
| 18 | 35193282 |
| 19 | 51193771 |
| 20 | 73066648 |
| 21 | 102508879 |
| 22 | 141589173 |
| 23 | 192806010 |
| 24 | 259151420 |
| 25 | 344180785 |
| 26 | 452088936 |
| 27 | 587792817 |
| 28 | 757020988 |
| 29 | 966410239 |