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 | 6 |
| 2 | 39 |
| 3 | 327 |
| 4 | 3556 |
| 5 | 48659 |
| 6 | 812462 |
| 7 | 16136404 |
| 8 | 373415239 |
| 9 | 9900007028 |
| 10 | 296557405704 |
| 11 | 9921937128500 |
| 12 | 367181525916035 |
| 13 | 14906571298831661 |
| 14 | 659191947156441025 |
| 15 | 31558799717042019635 |
| 16 | 1626968083690674214906 |