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 | 40 |
| 2 | 224 |
| 3 | 360 |
| 4 | 2016 |
| 5 | 174592 |
| 6 | 524160 |
| 7 | 1571328 |
| 8 | 492101632 |
| 9 | 4428914688 |
| 10 | 83350779494400 |
| 11 | 2163091537152000 |
| 12 | 2251247910912000 |
| 13 | 2931032952207360 |
| 14 | 7487050986455040 |
| 15 | 155086041146982400 |
| 16 | 369127262068899840 |
| 17 | 12682035945406464000 |
| 18 | 12848564519239680000 |