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 | 24 |
| 2 | 403 |
| 3 | 5850 |
| 4 | 78601 |
| 5 | 1007364 |
| 6 | 12509263 |
| 7 | 151886670 |
| 8 | 1813607701 |
| 9 | 21378247704 |
| 10 | 249446413723 |
| 11 | 2886767617890 |
| 12 | 33183014997601 |
| 13 | 379298878576044 |
| 14 | 4315144805143783 |
| 15 | 48895164279003510 |
| 16 | 552132521336304301 |