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 | 3 |
| 4 | 5 |
| 5 | 6 |
| 6 | 7 |
| 7 | 12 |
| 8 | 16 |
| 9 | 17 |
| 10 | 22 |
| 11 | 24 |
| 12 | 35 |
| 13 | 115 |
| 14 | 120 |
| 15 | 358 |
| 16 | 1488 |
| 17 | 1819 |
| 18 | 4679 |
| 19 | 9821 |
| 20 | 27217 |
| 21 | 27693 |
| 22 | 194413 |