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 | 0 |
| 2 | 60 |
| 3 | 108 |
| 4 | 336 |
| 5 | 1232 |
| 6 | 11088 |
| 7 | 114240 |
| 8 | 261888 |
| 9 | 320320 |
| 10 | 418880 |
| 11 | 2790720 |
| 12 | 2882880 |
| 13 | 3769920 |
| 14 | 6499584 |
| 15 | 9801792 |
| 16 | 16930368 |
| 17 | 19171152 |
| 18 | 35672000 |
| 19 | 47736000 |
| 20 | 51068160 |
| 21 | 98654400 |
| 22 | 110046720 |
| 23 | 172540368 |
| 24 | 229909120 |
| 25 | 403504640 |
| 26 | 487788480 |
| 27 | 738152448 |
| 28 | 755415680 |
| 29 | 886792320 |
| 30 | 1960686000 |
| 31 | 2070484416 |
| 32 | 2339064000 |
| 33 | 2889432000 |