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 | 29 |
| 2 | 582 |
| 3 | 10320 |
| 4 | 175923 |
| 5 | 2994981 |
| 6 | 51916865 |
| 7 | 925979626 |
| 8 | 17090776703 |
| 9 | 327434340233 |
| 10 | 6521424761488 |
| 11 | 135100311482136 |
| 12 | 2911046722097032 |
| 13 | 65214540352456616 |
| 14 | 1517981446941764000 |
| 15 | 36684237707505024560 |