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 | 2 |
| 2 | 9 |
| 3 | 31 |
| 4 | 79 |
| 5 | 185 |
| 6 | 408 |
| 7 | 864 |
| 8 | 1771 |
| 9 | 3555 |
| 10 | 7021 |
| 11 | 13696 |
| 12 | 26453 |
| 13 | 50700 |
| 14 | 96565 |
| 15 | 182983 |
| 16 | 345269 |
| 17 | 649188 |
| 18 | 1217000 |
| 19 | 2275699 |
| 20 | 4246229 |
| 21 | 7908427 |
| 22 | 14705711 |
| 23 | 27307682 |
| 24 | 50648414 |
| 25 | 93841900 |
| 26 | 173714334 |
| 27 | 321316013 |
| 28 | 593922885 |
| 29 | 1097150252 |
| 30 | 2025690002 |
| 31 | 3738341466 |
| 32 | 6896182121 |