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 | 44 |
| 2 | 1937 |
| 3 | 85272 |
| 4 | 3753905 |
| 5 | 165257092 |
| 6 | 7275065953 |
| 7 | 320268159024 |
| 8 | 14099074063009 |
| 9 | 620679526931420 |
| 10 | 27323998259045489 |
| 11 | 1202876602924932936 |
| 12 | 52953894526956094673 |
| 13 | 2331174235788993098548 |
| 14 | 102624620269242652430785 |
| 15 | 4517814466082465700053088 |