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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 11 |
| 13 | 21 |
| 14 | 41 |
| 15 | 81 |
| 16 | 161 |
| 17 | 321 |
| 18 | 641 |
| 19 | 1281 |
| 20 | 2561 |
| 21 | 5121 |
| 22 | 10241 |
| 23 | 20481 |
| 24 | 40951 |
| 25 | 81881 |
| 26 | 163721 |
| 27 | 327361 |
| 28 | 654561 |
| 29 | 1308801 |
| 30 | 2616961 |
| 31 | 5232641 |
| 32 | 10462721 |
| 33 | 20920321 |
| 34 | 41830401 |
| 35 | 83640321 |
| 36 | 167239691 |
| 37 | 334397501 |
| 38 | 668631281 |