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 | 1 |
| 2 | 21 |
| 3 | 55 |
| 4 | 385 |
| 5 | 49105 |
| 6 | 136081 |
| 7 | 701569 |
| 8 | 2830465 |
| 9 | 7996801 |
| 10 | 29158921 |
| 11 | 49268737 |
| 12 | 52617601 |