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 | 14 |
| 3 | 96 |
| 4 | 450 |
| 5 | 1650 |
| 6 | 5082 |
| 7 | 13728 |
| 8 | 33462 |
| 9 | 75075 |
| 10 | 157300 |
| 11 | 311168 |
| 12 | 586092 |
| 13 | 1058148 |
| 14 | 1841100 |
| 15 | 3100800 |
| 16 | 5073684 |
| 17 | 8090181 |
| 18 | 12603954 |
| 19 | 19228000 |
| 20 | 28778750 |
| 21 | 42329430 |
| 22 | 61274070 |
| 23 | 87403680 |
| 24 | 122996250 |
| 25 | 170922375 |
| 26 | 234768456 |
| 27 | 318979584 |
| 28 | 429024376 |
| 29 | 571584200 |
| 30 | 754769400 |