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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 18 |
| 6 | 42 |
| 7 | 66 |
| 8 | 168 |
| 9 | 300 |
| 10 | 910 |
| 11 | 1882 |
| 12 | 3192 |
| 13 | 5320 |
| 14 | 7166 |
| 15 | 8346 |
| 16 | 9042 |
| 17 | 7760 |
| 18 | 6668 |
| 19 | 4620 |
| 20 | 2822 |
| 21 | 1528 |
| 22 | 942 |
| 23 | 282 |
| 24 | 92 |
| 25 | 32 |
| 26 | 22 |
| 27 | 88 |
| 28 | 256 |
| 29 | 24 |