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 | 6 |
| 2 | 36 |
| 3 | 212 |
| 4 | 1221 |
| 5 | 6900 |
| 6 | 38543 |
| 7 | 214716 |
| 8 | 1193739 |
| 9 | 6628042 |
| 10 | 36773706 |
| 11 | 203951790 |
| 12 | 1130937489 |
| 13 | 6270501936 |
| 14 | 34764775155 |
| 15 | 192735759120 |
| 16 | 1068507612315 |
| 17 | 5923642360728 |
| 18 | 32839591629254 |
| 19 | 182056176609954 |
| 20 | 1009281733768068 |