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 | 7 |
| 2 | 190 |
| 3 | 5831 |
| 4 | 219626 |
| 5 | 8976562 |
| 6 | 394800204 |
| 7 | 18211045575 |
| 8 | 873216720082 |
| 9 | 43136486269382 |
| 10 | 2183722698469676 |
| 11 | 112795257850321202 |
| 12 | 5925951358743662260 |
| 13 | 315869014732813229716 |
| 14 | 17048301919464100932440 |
| 15 | 930217336628892162216135 |
| 16 | 51244644190683748419791970 |