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 | 45 |
| 2 | 121 |
| 3 | 1815 |
| 4 | 24000 |
| 5 | 297025 |
| 6 | 78250050 |
| 7 | 361 |
| 8 | 3509 |
| 9 | 30976 |
| 10 | 27216 |
| 11 | 403202 |
| 12 | 75 |
| 13 | 1805 |
| 14 | 1728 |
| 15 | 31500 |
| 16 | 508805 |
| 17 | 207368 |
| 18 | 1609152 |
| 19 | 227402340 |
| 20 | 29821320745 |
| 21 | 8223103375490 |
| 22 | 37158912 |
| 23 | 15482880000 |
| 24 | 5996600870820 |
| 25 | 1702422879696000 |
| 26 | 1176 |
| 27 | 324900 |
| 28 | 29859840 |
| 29 | 30950832 |
| 30 | 2518646460 |