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) |
|---|---|
| 2 | 2 |
| 3 | 8 |
| 4 | 54 |
| 5 | 556 |
| 6 | 8146 |
| 7 | 161424 |
| 8 | 4163438 |
| 9 | 135634292 |
| 10 | 5448798090 |
| 11 | 264689281240 |
| 12 | 15296907175462 |
| 13 | 1037373202178748 |
| 14 | 81588771795362114 |
| 15 | 7366855482991121696 |
| 16 | 756909709680583939806 |
| 17 | 87807399365909591247364 |