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 | 22 |
| 2 | 504 |
| 3 | 11328 |
| 4 | 254433 |
| 5 | 5714356 |
| 6 | 128339632 |
| 7 | 2882400037 |
| 8 | 64736277048 |
| 9 | 1453922256329 |
| 10 | 32653869265129 |
| 11 | 733378399940296 |
| 12 | 16471061151498380 |
| 13 | 369926160190271626 |
| 14 | 8308229975861003525 |
| 15 | 186595847388277259847 |
| 16 | 4190785566084546949287 |
| 17 | 94121513992523815815369 |