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 | 19 |
| 3 | 108 |
| 4 | 687 |
| 5 | 4766 |
| 6 | 35139 |
| 7 | 267486 |
| 8 | 2083814 |
| 9 | 16531372 |
| 10 | 133059504 |
| 11 | 1082995490 |
| 12 | 8896945667 |
| 13 | 73651718719 |
| 14 | 613664827254 |