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 | 17 |
| 2 | 305 |
| 3 | 5473 |
| 4 | 98209 |
| 5 | 1762289 |
| 6 | 31622993 |
| 7 | 567451585 |
| 8 | 10182505537 |
| 9 | 182717648081 |
| 10 | 3278735159921 |
| 11 | 58834515230497 |
| 12 | 1055742538989025 |
| 13 | 18944531186571953 |
| 14 | 339945818819306129 |
| 15 | 6100080207560938369 |