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 | 3 |
| 2 | 27 |
| 3 | 375 |
| 4 | 2058 |
| 5 | 19965 |
| 6 | 46137 |
| 7 | 176868 |
| 8 | 308655 |
| 9 | 803022 |
| 10 | 2560845 |
| 11 | 3574920 |
| 12 | 8661663 |
| 13 | 14473410 |
| 14 | 18366117 |
| 15 | 28655148 |
| 16 | 52255827 |
| 17 | 89339865 |
| 18 | 105546165 |
| 19 | 168728043 |
| 20 | 225483930 |
| 21 | 259085322 |
| 22 | 384570420 |
| 23 | 492308607 |
| 24 | 697919310 |
| 25 | 1073303448 |