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 | 3 |
| 2 | 6 |
| 3 | 210 |
| 4 | 88200 |
| 5 | 101970 |
| 6 | 193290 |
| 7 | 289680 |
| 8 | 993990 |
| 9 | 11264550 |
| 10 | 59068230 |
| 11 | 72776970 |
| 12 | 98746230 |
| 13 | 122460690 |
| 14 | 126500910 |
| 15 | 132766770 |
| 16 | 234150930 |
| 17 | 514442214 |
| 18 | 531391650 |
| 19 | 638082390 |
| 20 | 650428020 |
| 21 | 790769790 |
| 22 | 1249160790 |
| 23 | 3727074450 |
| 24 | 4775972850 |
| 25 | 8299675650 |
| 26 | 9530202210 |