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 | 11 |
| 2 | 516811 |
| 3 | 20402952601 |
| 4 | 196260616589761 |
| 5 | 239536538008051 |
| 6 | 426813020692661 |
| 7 | 2681027962124411 |
| 8 | 3605832801512401 |
| 9 | 6450361508166761 |
| 10 | 10392841156929031 |
| 11 | 13162202092936411 |
| 12 | 13655671002023851 |
| 13 | 14501847401205811 |