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 | 4671 |
| 2 | 173409 |
| 3 | 1763151 |
| 4 | 10396729 |
| 5 | 40629247 |
| 6 | 136061137 |
| 7 | 355442823 |
| 8 | 870473329 |
| 9 | 1876439327 |
| 10 | 3821007601 |
| 11 | 7047842559 |