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 | 17 |
| 2 | 257 |
| 3 | 2591 |
| 4 | 2593 |
| 5 | 239999 |
| 6 | 2488319 |
| 7 | 27659519 |
| 8 | 27659521 |
| 9 | 330301441 |
| 10 | 4232632319 |
| 11 | 58060799999 |
| 12 | 13243436236801 |
| 13 | 70614415872000001 |
| 14 | 3429209878281350809286344704000001 |
| 15 | 1665505492033205854772229590583093971095149084672000000001 |