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 | 13 |
| 6 | 229 |
| 7 | 242 |
| 8 | 309 |
| 9 | 957 |
| 10 | 1473 |
| 11 | 1494 |
| 12 | 3182 |
| 13 | 3727 |
| 14 | 4177 |
| 15 | 23210 |
| 16 | 25719 |
| 17 | 32835 |
| 18 | 36990 |
| 19 | 103958 |
| 20 | 789955 |
| 21 | 1038890 |