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 | 11 |
| 2 | 23 |
| 3 | 83 |
| 4 | 179 |
| 5 | 359 |
| 6 | 719 |
| 7 | 1439 |
| 8 | 2903 |
| 9 | 5903 |
| 10 | 11831 |
| 11 | 23819 |
| 12 | 47639 |
| 13 | 95723 |
| 14 | 191459 |
| 15 | 383219 |
| 16 | 766763 |
| 17 | 1533599 |
| 18 | 3067511 |
| 19 | 6135023 |
| 20 | 12271019 |
| 21 | 24542351 |
| 22 | 49085819 |
| 23 | 98172131 |
| 24 | 196344719 |
| 25 | 392689439 |
| 26 | 785379359 |
| 27 | 1570758719 |
| 28 | 3141519443 |