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 | 4 |
| 2 | 5 |
| 3 | 10 |
| 4 | 275 |
| 5 | 508 |
| 6 | 3694 |
| 7 | 5675 |
| 8 | 6562 |
| 9 | 32420 |
| 10 | 137782 |
| 11 | 295409 |
| 12 | 430645 |
| 13 | 13564046 |
| 14 | 22289981 |
| 15 | 387420490 |
| 16 | 3486784402 |