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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 5 |
| 5 | 3763 |
| 6 | 125714 |
| 7 | 167716 |
| 8 | 1803962 |
| 9 | 2895548 |
| 10 | 4031785 |
| 11 | 36226466 |
| 12 | 16207566916 |
| 13 | 103742264732 |
| 14 | 29000474325364 |
| 15 | 51053256144532 |
| 16 | 219291270961199 |
| 17 | 1611547934753332 |
| 18 | 5816826177630619 |