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 | 5 |
| 3 | 13 |
| 4 | 35 |
| 5 | 81 |
| 6 | 165 |
| 7 | 329 |
| 8 | 587 |
| 9 | 1059 |
| 10 | 1807 |
| 11 | 2939 |
| 12 | 4633 |
| 13 | 7431 |
| 14 | 11391 |
| 15 | 17091 |
| 16 | 25372 |
| 17 | 37343 |
| 18 | 53913 |
| 19 | 77393 |
| 20 | 109273 |
| 21 | 153857 |
| 22 | 214409 |
| 23 | 295293 |
| 24 | 403545 |
| 25 | 551715 |
| 26 | 745643 |
| 27 | 1001721 |
| 28 | 1339677 |
| 29 | 1784109 |