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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 7 |
| 10 | 34 |
| 11 | 129 |
| 12 | 432 |
| 13 | 1320 |
| 14 | 3807 |
| 15 | 10505 |
| 16 | 28094 |
| 17 | 73290 |
| 18 | 187579 |
| 19 | 472612 |
| 20 | 1175580 |
| 21 | 2892389 |
| 22 | 7050272 |
| 23 | 17045235 |
| 24 | 40913418 |
| 25 | 97571239 |
| 26 | 231337744 |
| 27 | 545590039 |
| 28 | 1280487083 |
| 29 | 2991833084 |
| 30 | 6961385026 |
| 31 | 16135193088 |
| 32 | 37263361364 |