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 | 1 |
| 2 | 6 |
| 3 | 65 |
| 4 | 1125 |
| 5 | 28132 |
| 6 | 950649 |
| 7 | 41475961 |
| 8 | 2259756900 |
| 9 | 149874308367 |
| 10 | 11858161118925 |
| 11 | 1101069785060610 |
| 12 | 118366544943589215 |
| 13 | 14564702419742606497 |
| 14 | 2031425158227034739646 |
| 15 | 318472106732688712103885 |
| 16 | 55708816671530680003669185 |
| 17 | 10803156636116962310987233404 |