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 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 13 |
| 8 | 17 |
| 9 | 413 |
| 10 | 555 |
| 11 | 2739 |
| 12 | 3509 |
| 13 | 3869 |
| 14 | 5513 |
| 15 | 12746 |
| 16 | 31808 |
| 17 | 76191 |
| 18 | 126237 |
| 19 | 430116 |
| 20 | 477190 |
| 21 | 1319307 |
| 22 | 3596185 |