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 | 1 |
| 3 | 1 |
| 4 | 8 |
| 5 | 12 |
| 6 | 135 |
| 7 | 199 |
| 8 | 378 |
| 9 | 600 |
| 10 | 1836 |
| 11 | 4897 |
| 12 | 8198 |
| 13 | 8993 |
| 14 | 84887 |
| 15 | 450287 |
| 16 | 892157 |
| 17 | 5053447 |
| 18 | 5183243 |
| 19 | 15350505 |
| 20 | 19963471 |
| 21 | 31631271 |
| 22 | 37655416 |
| 23 | 2138752269 |
| 24 | 4805947342 |
| 25 | 14508700588 |
| 26 | 27508373127 |
| 27 | 28635924075 |
| 28 | 30814114095 |
| 29 | 32073629885 |
| 30 | 961160400603 |
| 31 | 3607716972786 |