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 | 6 |
| 3 | 60 |
| 4 | 90 |
| 5 | 120 |
| 6 | 672 |
| 7 | 2160 |
| 8 | 10080 |
| 9 | 22848 |
| 10 | 30240 |
| 11 | 342720 |
| 12 | 523776 |
| 13 | 1028160 |
| 14 | 1528800 |
| 15 | 6168960 |
| 16 | 7856640 |
| 17 | 7983360 |
| 18 | 14443520 |
| 19 | 22932000 |
| 20 | 23569920 |
| 21 | 43330560 |
| 22 | 44553600 |
| 23 | 51979200 |
| 24 | 57657600 |
| 25 | 68796000 |
| 26 | 133660800 |
| 27 | 172972800 |
| 28 | 779688000 |
| 29 | 1476304896 |
| 30 | 2339064000 |
| 31 | 6840038400 |