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 | 2 |
| 4 | 4 |
| 5 | 6 |
| 6 | 12 |
| 7 | 36 |
| 8 | 96 |
| 9 | 240 |
| 10 | 480 |
| 11 | 1440 |
| 12 | 5760 |
| 13 | 17280 |
| 14 | 40320 |
| 15 | 120960 |
| 16 | 483840 |
| 17 | 1935360 |
| 18 | 5806080 |
| 19 | 17418240 |
| 20 | 69672960 |
| 21 | 348364800 |
| 22 | 1045094400 |
| 23 | 3832012800 |
| 24 | 15328051200 |
| 25 | 76640256000 |
| 26 | 229920768000 |
| 27 | 919683072000 |
| 28 | 4598415360000 |
| 29 | 22072393728000 |
| 30 | 71735279616000 |
| 31 | 286941118464000 |
| 32 | 1434705592320000 |