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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 17 |
| 5 | 113 |
| 6 | 7729 |
| 7 | 224689 |
| 8 | 61562033 |
| 9 | 7309130417 |
| 10 | 8013328398001 |
| 11 | 3825133597372081 |
| 12 | 16776170217003753137 |
| 13 | 32072986971771549318833 |
| 14 | 562672074981014060438175409 |
| 15 | 4304275145962667488546071527089 |
| 16 | 302049699050029408242290021253725873 |