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 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 24 |
| 4 | 64 |
| 5 | 160 |
| 6 | 384 |
| 7 | 896 |
| 8 | 2048 |
| 9 | 4608 |
| 10 | 10240 |
| 11 | 22528 |
| 12 | 49152 |
| 13 | 106496 |
| 14 | 229376 |
| 15 | 491520 |
| 16 | 1048576 |
| 17 | 2228224 |
| 18 | 4718592 |
| 19 | 9961472 |
| 20 | 20971520 |
| 21 | 44040192 |
| 22 | 92274688 |
| 23 | 192937984 |
| 24 | 402653184 |
| 25 | 838860800 |
| 26 | 1744830464 |
| 27 | 3623878656 |
| 28 | 7516192768 |