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 | 8 |
| 3 | 4 |
| 4 | 21 |
| 5 | 32 |
| 6 | 36 |
| 7 | 161 |
| 8 | 264 |
| 9 | 430 |
| 10 | 1475 |
| 11 | 2598 |
| 12 | 4872 |
| 13 | 14489 |
| 14 | 27382 |
| 15 | 55350 |
| 16 | 152073 |
| 17 | 300506 |
| 18 | 637120 |
| 19 | 1666139 |
| 20 | 3393668 |
| 21 | 7453726 |
| 22 | 18821937 |
| 23 | 39280750 |
| 24 | 88534484 |
| 25 | 217732841 |
| 26 | 464385964 |
| 27 | 1065353486 |
| 28 | 2568691553 |
| 29 | 5587193344 |
| 30 | 12959951420 |