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 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 10 |
| 7 | 17 |
| 8 | 39 |
| 9 | 119 |
| 10 | 254 |
| 11 | 613 |
| 12 | 1623 |
| 13 | 3791 |
| 14 | 9281 |
| 15 | 23469 |
| 16 | 56823 |
| 17 | 140035 |
| 18 | 349167 |
| 19 | 857868 |
| 20 | 2122297 |
| 21 | 5274213 |
| 22 | 13044870 |
| 23 | 32357838 |
| 24 | 80421284 |
| 25 | 199613489 |
| 26 | 496144310 |
| 27 | 1234420850 |
| 28 | 3070773600 |
| 29 | 7644879181 |
| 30 | 19044266176 |
| 31 | 47450853932 |
| 32 | 118290412077 |
| 33 | 295019269801 |