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 | 99 |
| 3 | 99 |
| 4 | 211 |
| 5 | 655 |
| 6 | 1458 |
| 7 | 4224 |
| 8 | 10633 |
| 9 | 28365 |
| 10 | 75175 |
| 11 | 201031 |
| 12 | 544217 |
| 13 | 1452266 |
| 14 | 3908208 |
| 15 | 10505646 |
| 16 | 28266755 |
| 17 | 76097248 |
| 18 | 204983456 |
| 19 | 552420015 |
| 20 | 1488384837 |
| 21 | 4011805443 |
| 22 | 10816167549 |
| 23 | 29162780211 |
| 24 | 78639733211 |
| 25 | 212076547630 |