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 | 3 |
| 2 | 4 |
| 3 | 5 |
| 4 | 8 |
| 5 | 17 |
| 6 | 19 |
| 7 | 29 |
| 8 | 124 |
| 9 | 304 |
| 10 | 640 |
| 11 | 1205 |
| 12 | 1549 |
| 13 | 1805 |
| 14 | 2492 |
| 15 | 2945 |
| 16 | 13075 |
| 17 | 20237 |
| 18 | 102763 |
| 19 | 173755 |
| 20 | 173828 |
| 21 | 174040 |