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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 10 |
| 6 | 23 |
| 7 | 51 |
| 8 | 117 |
| 9 | 250 |
| 10 | 524 |
| 11 | 1123 |
| 12 | 2428 |
| 13 | 5274 |
| 14 | 11493 |
| 15 | 24927 |
| 16 | 54025 |
| 17 | 117003 |
| 18 | 253155 |
| 19 | 548139 |
| 20 | 1187354 |
| 21 | 2572374 |
| 22 | 5573514 |
| 23 | 12074638 |
| 24 | 26156163 |
| 25 | 56658896 |
| 26 | 122731402 |
| 27 | 265858041 |
| 28 | 575909407 |
| 29 | 1247556710 |
| 30 | 2702508126 |
| 31 | 5854265152 |