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 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 6 |
| 6 | 18 |
| 7 | 55 |
| 8 | 230 |
| 9 | 1063 |
| 10 | 6161 |
| 11 | 41004 |
| 12 | 312782 |
| 13 | 2618995 |
| 14 | 23549346 |
| 15 | 222764216 |