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 | 5 |
| 2 | 17 |
| 3 | 12 |
| 4 | 29 |
| 5 | 73 |
| 6 | 156 |
| 7 | 361 |
| 8 | 865 |
| 9 | 1970 |
| 10 | 4530 |
| 11 | 10571 |
| 12 | 24394 |
| 13 | 56204 |
| 14 | 130230 |
| 15 | 301221 |
| 16 | 695541 |
| 17 | 1608549 |
| 18 | 3720177 |
| 19 | 8597848 |
| 20 | 19876759 |
| 21 | 45959426 |
| 22 | 106246321 |
| 23 | 245619039 |
| 24 | 567865144 |
| 25 | 1312830532 |
| 26 | 3035049693 |
| 27 | 7016724012 |
| 28 | 16221856134 |
| 29 | 37502724170 |