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 | 3 |
| 3 | 6 |
| 4 | 12 |
| 5 | 22 |
| 6 | 44 |
| 7 | 88 |
| 8 | 176 |
| 9 | 352 |
| 10 | 697 |
| 11 | 1394 |
| 12 | 2788 |
| 13 | 5576 |
| 14 | 11152 |
| 15 | 22304 |
| 16 | 44608 |
| 17 | 89172 |
| 18 | 178344 |
| 19 | 356688 |
| 20 | 713376 |
| 21 | 1426752 |
| 22 | 2853504 |
| 23 | 5707008 |
| 24 | 11414016 |
| 25 | 22828032 |
| 26 | 45655636 |
| 27 | 91311272 |
| 28 | 182622544 |
| 29 | 365245088 |
| 30 | 730490176 |
| 31 | 1460980352 |
| 32 | 2921960704 |
| 33 | 5843921408 |