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 | 0 |
| 2 | 43 |
| 3 | 2440 |
| 4 | 2643 |
| 5 | 2860 |
| 6 | 16443 |
| 7 | 17620 |
| 8 | 18879 |
| 9 | 97980 |
| 10 | 104839 |
| 11 | 112176 |
| 12 | 573199 |
| 13 | 613176 |
| 14 | 655939 |
| 15 | 3342976 |
| 16 | 3575979 |
| 17 | 3825220 |
| 18 | 19486419 |
| 19 | 20844460 |
| 20 | 22297143 |
| 21 | 113577300 |
| 22 | 121492543 |
| 23 | 129959400 |
| 24 | 661979143 |
| 25 | 708112560 |
| 26 | 757461019 |
| 27 | 3858299320 |