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) |
|---|---|
| 2 | 6 |
| 3 | 22 |
| 4 | 120 |
| 5 | 280 |
| 6 | 1240 |
| 7 | 1120 |
| 8 | 5400 |
| 9 | 5280 |
| 10 | 12960 |
| 11 | 12880 |
| 12 | 45240 |
| 13 | 24752 |
| 14 | 90240 |
| 15 | 59160 |
| 16 | 96000 |
| 17 | 141984 |
| 18 | 346880 |
| 19 | 163800 |
| 20 | 540000 |
| 21 | 326720 |
| 22 | 588984 |
| 23 | 585120 |
| 24 | 1523280 |
| 25 | 582400 |
| 26 | 1728000 |
| 27 | 1203840 |
| 28 | 2294712 |
| 29 | 1758096 |
| 30 | 4692408 |
| 31 | 1388000 |
| 32 | 6480000 |
| 33 | 3787200 |
| 34 | 5416800 |
| 35 | 4783680 |
| 36 | 7440000 |