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 | 0 |
| 2 | 264 |
| 3 | 9976 |
| 4 | 291315 |
| 5 | 17406354 |
| 6 | 918298857 |
| 7 | 40765995197 |
| 8 | 1834679734692 |
| 9 | 84286370436052 |
| 10 | 3803767919559602 |
| 11 | 169217277043021433 |