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 | 5 |
| 2 | 121 |
| 3 | 4690 |
| 4 | 228065 |
| 5 | 12673173 |
| 6 | 768897585 |
| 7 | 49645423227 |
| 8 | 3357669088200 |
| 9 | 235393836387360 |
| 10 | 16981887962145418 |
| 11 | 1254065444086727685 |
| 12 | 94424981678123285373 |
| 13 | 7227272422780512414100 |
| 14 | 560989900421822288646265 |
| 15 | 44076648941211191411236261 |
| 16 | 3500015582480750626266664105 |