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 | 657 |
| 3 | 17664 |
| 4 | 477828 |
| 5 | 12888288 |
| 6 | 348197220 |
| 7 | 9397548288 |
| 8 | 253804616001 |
| 9 | 6851337236952 |
| 10 | 185014241769825 |
| 11 | 4994797849546752 |
| 12 | 134872057740184128 |
| 13 | 3641273395825798656 |
| 14 | 98320397048549301312 |
| 15 | 2654515896013953110016 |
| 16 | 71674988018612154171876 |