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 | 3 |
| 2 | 18 |
| 3 | 111 |
| 4 | 840 |
| 5 | 6655 |
| 6 | 54109 |
| 7 | 456361 |
| 8 | 3954180 |
| 9 | 34900212 |
| 10 | 312357933 |
| 11 | 2826683629 |
| 12 | 25814570671 |
| 13 | 237542444179 |
| 14 | 2199894223891 |