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) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 3 |
| 3 | 3 |
| 4 | 9 |
| 5 | 15 |
| 6 | 31 |
| 7 | 57 |
| 8 | 108 |
| 9 | 199 |
| 10 | 366 |
| 11 | 666 |
| 12 | 1205 |
| 13 | 2166 |
| 14 | 3873 |
| 15 | 6891 |
| 16 | 12207 |
| 17 | 21537 |
| 18 | 37859 |
| 19 | 66327 |
| 20 | 115842 |
| 21 | 201743 |
| 22 | 350412 |
| 23 | 607140 |
| 24 | 1049545 |
| 25 | 1810428 |
| 26 | 3116655 |
| 27 | 5355219 |
| 28 | 9185349 |
| 29 | 15728547 |
| 30 | 26890375 |
| 31 | 45904773 |
| 32 | 78253896 |
| 33 | 133221079 |