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 | 12 |
| 2 | 66 |
| 3 | 572 |
| 4 | 5148 |
| 5 | 49764 |
| 6 | 497354 |
| 7 | 5118828 |
| 8 | 53745120 |
| 9 | 573308736 |
| 10 | 6191711526 |
| 11 | 67546215516 |
| 12 | 743008120140 |
| 13 | 8230246567620 |
| 14 | 91708459194066 |
| 15 | 1027134771622388 |
| 16 | 11555266154065920 |
| 17 | 130506535690613940 |