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 | 6 |
| 3 | 35 |
| 4 | 268 |
| 5 | 2421 |
| 6 | 26978 |
| 7 | 349063 |
| 8 | 5258520 |
| 9 | 89121833 |
| 10 | 1697446846 |
| 11 | 35576664363 |
| 12 | 819585397028 |
| 13 | 20461925870365 |