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 | 7 |
| 2 | 49 |
| 3 | 346 |
| 4 | 2444 |
| 5 | 17261 |
| 6 | 121906 |
| 7 | 860963 |
| 8 | 6080563 |
| 9 | 42944057 |
| 10 | 303292974 |
| 11 | 2142010664 |
| 12 | 15127978816 |
| 13 | 106841551680 |
| 14 | 754569880366 |
| 15 | 5329159820340 |
| 16 | 37637262140584 |
| 17 | 265813664666689 |