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 | 6 |
| 2 | 90 |
| 3 | 1806 |
| 4 | 41586 |
| 5 | 1037718 |
| 6 | 27297738 |
| 7 | 745387038 |
| 8 | 20927156706 |
| 9 | 600318853926 |
| 10 | 17518619320890 |
| 11 | 518431875418926 |
| 12 | 15521467648875090 |
| 13 | 469286147871837366 |
| 14 | 14308406109097843626 |
| 15 | 439442782615614361662 |
| 16 | 13582285614213903189954 |
| 17 | 422158527806921249683014 |