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 | 5 |
| 6 | 12 |
| 7 | 18 |
| 8 | 35 |
| 9 | 51 |
| 10 | 53 |
| 11 | 78 |
| 12 | 209 |
| 13 | 396 |
| 14 | 4166 |
| 15 | 9091 |
| 16 | 9587 |
| 17 | 13357 |
| 18 | 15917 |
| 19 | 17652 |
| 20 | 46127 |
| 21 | 66480 |