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 | 5 |
| 4 | 166 |
| 5 | 287603 |
| 6 | 9241538 |
| 7 | 2366680105 |
| 8 | 8347156585 |
| 9 | 21682897793 |
| 10 | 6988245760865 |
| 11 | 9045859950329 |
| 12 | 10076294257985 |
| 13 | 50299408064905 |
| 14 | 254874726648713 |