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 | 3 |
| 3 | 5 |
| 4 | 9 |
| 5 | 18 |
| 6 | 63 |
| 7 | 72 |
| 8 | 74 |
| 9 | 104 |
| 10 | 111 |
| 11 | 116 |
| 12 | 117 |
| 13 | 565 |
| 14 | 621 |
| 15 | 734 |
| 16 | 1242 |
| 17 | 1620 |
| 18 | 4596 |
| 19 | 4728 |
| 20 | 5823 |
| 21 | 5956 |
| 22 | 21135 |
| 23 | 28251 |
| 24 | 46530 |
| 25 | 46908 |
| 26 | 78257 |
| 27 | 129619 |
| 28 | 277407 |
| 29 | 463689 |
| 30 | 464706 |
| 31 | 599119 |