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) |
|---|---|
| 0 | 1 |
| 1 | 144 |
| 2 | 193104 |
| 3 | 16809408 |
| 4 | 397822032 |
| 5 | 4630076640 |
| 6 | 34416785088 |
| 7 | 187487524224 |
| 8 | 814891939920 |
| 9 | 2975535123408 |
| 10 | 9486534607200 |
| 11 | 27053022904128 |
| 12 | 70486183583424 |
| 13 | 169931012132448 |
| 14 | 384163644219264 |
| 15 | 820166796086400 |