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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 7 |
| 5 | 31 |
| 6 | 184 |
| 7 | 1351 |
| 8 | 12524 |
| 9 | 146468 |
| 10 | 2177570 |
| 11 | 41374407 |
| 12 | 1008220289 |
| 13 | 31559446774 |
| 14 | 1269310589336 |
| 15 | 65562045668340 |
| 16 | 4345161435996517 |