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 | 7 |
| 2 | 57 |
| 3 | 529 |
| 4 | 5509 |
| 5 | 63591 |
| 6 | 805597 |
| 7 | 11109337 |
| 8 | 165625929 |
| 9 | 2654025319 |
| 10 | 45481765921 |
| 11 | 829903882017 |
| 12 | 16062421776397 |
| 13 | 328634683136839 |
| 14 | 7086337847838789 |
| 15 | 160604998959958441 |
| 16 | 3816483607166825617 |