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 | 5 |
| 3 | 36 |
| 4 | 336 |
| 5 | 3793 |
| 6 | 49691 |
| 7 | 736301 |
| 8 | 12130141 |
| 9 | 219488417 |
| 10 | 4322334090 |
| 11 | 91974793971 |
| 12 | 2102457339356 |
| 13 | 51377007363853 |
| 14 | 1336508757460743 |
| 15 | 36876168645675673 |
| 16 | 1075680625224925835 |
| 17 | 33076997985647151025 |