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 | 24 |
| 2 | 552 |
| 3 | 12696 |
| 4 | 292008 |
| 5 | 6715908 |
| 6 | 154459536 |
| 7 | 3552423600 |
| 8 | 81702391056 |
| 9 | 1879077904176 |
| 10 | 43217018799372 |
| 11 | 993950655137880 |
| 12 | 22859927229943848 |
| 13 | 525756756894338904 |
| 14 | 12091909332851083560 |
| 15 | 278102505382114851108 |