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 | 3 |
| 1 | 22 |
| 2 | 22 |
| 3 | 355 |
| 4 | 355 |
| 5 | 312689 |
| 6 | 1146408 |
| 7 | 5419351 |
| 8 | 245850922 |
| 9 | 2549491779 |
| 10 | 21053343141 |
| 11 | 21053343141 |
| 12 | 1783366216531 |
| 13 | 8958937768937 |
| 14 | 139755218526789 |
| 15 | 428224593349304 |
| 16 | 30246273033735921 |
| 17 | 66627445592888887 |