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 | 2 |
| 2 | 3 |
| 3 | 18 |
| 4 | 21 |
| 5 | 138 |
| 6 | 156 |
| 7 | 52 |
| 8 | 84 |
| 9 | 28 |
| 10 | 12 |
| 11 | 4 |
| 12 | 1376 |
| 13 | 406 |
| 14 | 7 |
| 15 | 58 |
| 16 | 2544 |
| 17 | 3953 |
| 18 | 16686 |
| 19 | 5562 |
| 20 | 1854 |
| 21 | 618 |
| 22 | 162 |
| 23 | 54 |
| 24 | 6 |
| 25 | 47256 |
| 26 | 11814 |
| 27 | 1432 |
| 28 | 264 |
| 29 | 179 |
| 30 | 66 |
| 31 | 8 |