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 | 3 |
| 2 | 22 |
| 3 | 195 |
| 4 | 1946 |
| 5 | 20790 |
| 6 | 232716 |
| 7 | 2693691 |
| 8 | 31979090 |
| 9 | 387243714 |
| 10 | 4764470932 |
| 11 | 59391201870 |
| 12 | 748472730628 |
| 13 | 9520446996300 |
| 14 | 122067269204760 |
| 15 | 1575965219205195 |
| 16 | 20470515781159170 |
| 17 | 267325017886787850 |