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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 26 |
| 4 | 130 |
| 5 | 670 |
| 6 | 3466 |
| 7 | 17985 |
| 8 | 93179 |
| 9 | 482762 |
| 10 | 2501013 |
| 11 | 12956855 |
| 12 | 67125243 |
| 13 | 347753857 |
| 14 | 1801596939 |