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 | 11 |
| 3 | 171 |
| 4 | 3056 |
| 5 | 58916 |
| 6 | 1191376 |
| 7 | 24896436 |
| 8 | 532911346 |
| 9 | 11617952106 |
| 10 | 256966100966 |
| 11 | 5750337968926 |
| 12 | 129926216608236 |
| 13 | 2959472057112396 |
| 14 | 67877180959091156 |
| 15 | 1566072624078270516 |
| 16 | 36319953436423545851 |