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 | 3 |
| 3 | 9 |
| 4 | 22 |
| 5 | 50 |
| 6 | 113 |
| 7 | 256 |
| 8 | 576 |
| 9 | 1281 |
| 10 | 2818 |
| 11 | 6146 |
| 12 | 13313 |
| 13 | 28672 |
| 14 | 61440 |
| 15 | 131073 |
| 16 | 278530 |
| 17 | 589826 |
| 18 | 1245185 |
| 19 | 2621440 |
| 20 | 5505024 |
| 21 | 11534337 |
| 22 | 24117250 |
| 23 | 50331650 |
| 24 | 104857601 |
| 25 | 218103808 |
| 26 | 452984832 |
| 27 | 939524097 |
| 28 | 1946157058 |
| 29 | 4026531842 |
| 30 | 8321499137 |
| 31 | 17179869184 |
| 32 | 35433480192 |