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 | 29 |
| 4 | 102 |
| 5 | 796 |
| 6 | 4769 |
| 7 | 35905 |
| 8 | 267789 |
| 9 | 2101184 |
| 10 | 16809690 |
| 11 | 137487157 |
| 12 | 1147385627 |
| 13 | 9745119882 |