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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 25 |
| 4 | 461 |
| 5 | 2821 |
| 6 | 84883 |
| 7 | 734161 |
| 8 | 30684601 |
| 9 | 342800821 |
| 10 | 18348174791 |
| 11 | 251203133545 |
| 12 | 16394732478853 |
| 13 | 265727053328101 |
| 14 | 20464206411678331 |
| 15 | 383172119935376161 |
| 16 | 34011762638354230001 |
| 17 | 722380674949394645269 |