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 | 1 |
| 2 | 2 |
| 3 | 21 |
| 4 | 25 |
| 5 | 33 |
| 6 | 54 |
| 7 | 78 |
| 8 | 235 |
| 9 | 1566 |
| 10 | 2273 |
| 11 | 2310 |
| 12 | 4121 |
| 13 | 7775 |
| 14 | 42249 |
| 15 | 105974 |
| 16 | 138961 |