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 | 8 |
| 1 | 17 |
| 2 | 36 |
| 3 | 76 |
| 4 | 160 |
| 5 | 336 |
| 6 | 704 |
| 7 | 1472 |
| 8 | 3072 |
| 9 | 6400 |
| 10 | 13312 |
| 11 | 27648 |
| 12 | 57344 |
| 13 | 118784 |
| 14 | 245760 |
| 15 | 507904 |
| 16 | 1048576 |
| 17 | 2162688 |
| 18 | 4456448 |
| 19 | 9175040 |
| 20 | 18874368 |
| 21 | 38797312 |
| 22 | 79691776 |
| 23 | 163577856 |
| 24 | 335544320 |
| 25 | 687865856 |
| 26 | 1409286144 |
| 27 | 2885681152 |
| 28 | 5905580032 |