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 | 216 |
| 2 | 660 |
| 3 | 1484 |
| 4 | 1560 |
| 5 | 8208 |
| 6 | 52164 |
| 7 | 544320 |
| 8 | 592956 |
| 9 | 649800 |
| 10 | 4321800 |
| 11 | 5103210 |
| 12 | 6182220 |
| 13 | 10621380 |
| 14 | 21415680 |
| 15 | 24471720 |
| 16 | 135307008 |
| 17 | 359624088 |
| 18 | 535019100 |
| 19 | 1071782250 |
| 20 | 1113233520 |
| 21 | 1227427740 |
| 22 | 1527496740 |
| 23 | 9462748008 |
| 24 | 143935711920 |