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 | 0 |
| 2 | 0 |
| 3 | 49 |
| 4 | 376 |
| 5 | 1858 |
| 6 | 5696 |
| 7 | 16427 |
| 8 | 36992 |
| 9 | 78204 |
| 10 | 150672 |
| 11 | 277005 |
| 12 | 463624 |
| 13 | 776494 |
| 14 | 1212208 |
| 15 | 1845911 |
| 16 | 2749568 |
| 17 | 4023608 |
| 18 | 5654976 |
| 19 | 7915497 |
| 20 | 10730616 |
| 21 | 14487706 |
| 22 | 19290352 |
| 23 | 25343011 |
| 24 | 32580752 |
| 25 | 41959412 |
| 26 | 53240624 |
| 27 | 66913605 |
| 28 | 83330712 |