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 | 1 |
| 5 | 3 |
| 6 | 7 |
| 7 | 69 |
| 8 | 574 |
| 9 | 3336 |
| 10 | 23562 |
| 11 | 140933 |
| 12 | 948340 |
| 13 | 5733551 |
| 14 | 37091416 |
| 15 | 225775799 |
| 16 | 1419329282 |
| 17 | 8589008422 |