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 | 16 |
| 4 | 48 |
| 5 | 96 |
| 6 | 256 |
| 7 | 512 |
| 8 | 1280 |
| 9 | 2560 |
| 10 | 6144 |
| 11 | 12288 |
| 12 | 28672 |
| 13 | 57344 |
| 14 | 131072 |
| 15 | 262144 |
| 16 | 589824 |
| 17 | 1179648 |
| 18 | 2621440 |
| 19 | 5242880 |
| 20 | 11534336 |
| 21 | 23068672 |
| 22 | 50331648 |
| 23 | 100663296 |
| 24 | 218103808 |
| 25 | 436207616 |
| 26 | 939524096 |
| 27 | 1879048192 |
| 28 | 4026531840 |
| 29 | 8053063680 |
| 30 | 17179869184 |