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 | 3 |
| 4 | 2 |
| 5 | 2 |
| 6 | 6 |
| 7 | 6 |
| 8 | 24 |
| 9 | 24 |
| 10 | 120 |
| 11 | 120 |
| 12 | 1200 |
| 13 | 1440 |
| 14 | 4320 |
| 15 | 4320 |
| 16 | 8640 |
| 17 | 30240 |
| 18 | 60480 |
| 19 | 483840 |
| 20 | 967680 |
| 21 | 1935360 |
| 22 | 3870720 |
| 23 | 17418240 |
| 24 | 34836480 |
| 25 | 348364800 |
| 26 | 696729600 |
| 27 | 1741824000 |
| 28 | 3483648000 |
| 29 | 19160064000 |
| 30 | 38320128000 |
| 31 | 689762304000 |
| 32 | 1379524608000 |
| 33 | 9656672256000 |
| 34 | 16554295296000 |
| 35 | 66217181184000 |