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 | 1 |
| 2 | 7 |
| 3 | 46 |
| 4 | 366 |
| 5 | 3647 |
| 6 | 44205 |
| 7 | 630956 |
| 8 | 10350572 |
| 9 | 191704349 |
| 10 | 3954598099 |
| 11 | 89888942874 |
| 12 | 2231742720730 |
| 13 | 60083847852539 |
| 14 | 1743321481158041 |
| 15 | 54226970410827160 |
| 16 | 1800062257926566488 |
| 17 | 63512168752599139129 |
| 18 | 2373501269897667585631 |