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 | 3 |
| 5 | 8 |
| 6 | 17 |
| 7 | 21 |
| 8 | 44 |
| 9 | 48 |
| 10 | 55 |
| 11 | 68 |
| 12 | 145 |
| 13 | 201 |
| 14 | 271 |
| 15 | 2729 |
| 16 | 2840 |
| 17 | 4561 |
| 18 | 31809 |
| 19 | 43185 |
| 20 | 48108 |
| 21 | 92690 |