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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 15 |
| 7 | 22 |
| 8 | 36 |
| 9 | 72 |
| 10 | 165 |
| 11 | 385 |
| 12 | 859 |
| 13 | 1807 |
| 14 | 3614 |
| 15 | 6995 |
| 16 | 13380 |
| 17 | 25773 |
| 18 | 50559 |
| 19 | 101118 |
| 20 | 204820 |
| 21 | 416405 |
| 22 | 843756 |
| 23 | 1698458 |
| 24 | 3396916 |
| 25 | 6765175 |
| 26 | 13455325 |
| 27 | 26789257 |
| 28 | 53457121 |
| 29 | 106914242 |
| 30 | 214146295 |
| 31 | 429124630 |
| 32 | 859595529 |
| 33 | 1720537327 |
| 34 | 3441074654 |