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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 12 |
| 5 | 12 |
| 6 | 36 |
| 7 | 36 |
| 8 | 36 |
| 9 | 108 |
| 10 | 108 |
| 11 | 108 |
| 12 | 324 |
| 13 | 324 |
| 14 | 324 |
| 15 | 972 |
| 16 | 972 |
| 17 | 972 |
| 18 | 2916 |
| 19 | 2916 |
| 20 | 2916 |
| 21 | 8748 |
| 22 | 8748 |
| 23 | 8748 |
| 24 | 26244 |
| 25 | 26244 |
| 26 | 26244 |
| 27 | 78732 |
| 28 | 78732 |
| 29 | 78732 |
| 30 | 236196 |
| 31 | 236196 |
| 32 | 236196 |
| 33 | 708588 |
| 34 | 708588 |
| 35 | 708588 |
| 36 | 2125764 |
| 37 | 2125764 |
| 38 | 2125764 |
| 39 | 6377292 |
| 40 | 6377292 |