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) |
|---|---|
| 1 | 5 |
| 2 | 13 |
| 3 | 69 |
| 4 | 289 |
| 5 | 1971 |
| 6 | 3997 |
| 7 | 20371 |
| 8 | 45751 |
| 9 | 120957 |
| 10 | 205299 |
| 11 | 629847 |
| 12 | 897801 |
| 13 | 2334409 |
| 14 | 3461459 |
| 15 | 5517131 |
| 16 | 8468061 |