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 | 39 |
| 2 | 779 |
| 3 | 10621 |
| 4 | 111149 |
| 5 | 951899 |
| 6 | 6946342 |
| 7 | 44406362 |
| 8 | 253761833 |
| 9 | 1316306927 |
| 10 | 6272724030 |
| 11 | 27727887538 |
| 12 | 114598003169 |
| 13 | 445761614951 |
| 14 | 1641026089535 |
| 15 | 5744952627593 |
| 16 | 19204564723487 |
| 17 | 61521719896985 |
| 18 | 189464360814690 |