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) |
|---|---|
| 1 | 2 |
| 2 | 8 |
| 3 | 46 |
| 4 | 352 |
| 5 | 1126 |
| 6 | 13016 |
| 7 | 176138 |
| 8 | 182144 |
| 9 | 3186538 |
| 10 | 62075752 |
| 11 | 63461422 |
| 12 | 1488711776 |
| 13 | 7577414602 |
| 14 | 23104065256 |
| 15 | 680057071574 |
| 16 | 21372905414144 |
| 17 | 21646396991594 |
| 18 | 21904260478904 |
| 19 | 819482859775298 |
| 20 | 828045249930848 |