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 | 2 |
| 5 | 4 |
| 6 | 6 |
| 7 | 12 |
| 8 | 24 |
| 9 | 48 |
| 10 | 120 |
| 11 | 240 |
| 12 | 720 |
| 13 | 1440 |
| 14 | 4320 |
| 15 | 8640 |
| 16 | 25920 |
| 17 | 60480 |
| 18 | 181440 |
| 19 | 483840 |
| 20 | 1451520 |
| 21 | 3870720 |
| 22 | 11612160 |
| 23 | 34836480 |
| 24 | 104509440 |
| 25 | 348364800 |
| 26 | 1045094400 |
| 27 | 3483648000 |
| 28 | 10450944000 |
| 29 | 38320128000 |
| 30 | 114960384000 |
| 31 | 459841536000 |
| 32 | 1379524608000 |
| 33 | 5518098432000 |
| 34 | 16554295296000 |