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 | 65537 |
| 2 | 43112257 |
| 3 | 4338014017 |
| 4 | 156882857921 |
| 5 | 2973697798081 |
| 6 | 36054040477057 |
| 7 | 314707907280257 |
| 8 | 2134495165562497 |
| 9 | 11853020188851841 |
| 10 | 55949729863572161 |
| 11 | 230833988758608577 |
| 12 | 850300868078216257 |