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 | 576 |
| 2 | 6912 |
| 3 | 198816 |
| 4 | 4998648 |
| 5 | 119790816 |
| 6 | 2783857776 |
| 7 | 63310818360 |
| 8 | 1416701634552 |
| 9 | 31304407671636 |
| 10 | 684763778434512 |
| 11 | 14854833017622684 |
| 12 | 320017408314705960 |
| 13 | 6853471478780510820 |
| 14 | 146027732878366085832 |
| 15 | 3097663460112852295020 |