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) |
|---|---|
| 1 | 3 |
| 2 | 2 |
| 3 | 1 |
| 4 | 8 |
| 5 | 90 |
| 6 | 168 |
| 7 | 9352 |
| 8 | 46189 |
| 9 | 2515371 |
| 10 | 721970 |
| 11 | 6449639 |
| 12 | 565062156 |
| 13 | 11336460025 |
| 14 | 37151747513 |
| 15 | 256994754033 |