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 | 8 |
| 2 | 46 |
| 3 | 242 |
| 4 | 1234 |
| 5 | 6218 |
| 6 | 31186 |
| 7 | 156122 |
| 8 | 780994 |
| 9 | 3905738 |
| 10 | 19530226 |
| 11 | 97654202 |
| 12 | 488277154 |
| 13 | 2441398058 |
| 14 | 12207014866 |
| 15 | 61035123482 |
| 16 | 305175715714 |
| 17 | 1525878775178 |
| 18 | 7629394269106 |
| 19 | 38146972131962 |
| 20 | 190734862232674 |