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 | 456 |
| 3 | 17316 |
| 4 | 657552 |
| 5 | 24969660 |
| 6 | 948189528 |
| 7 | 36006232404 |
| 8 | 1367288641824 |
| 9 | 51920962156908 |
| 10 | 1971629273320680 |
| 11 | 74869991424028932 |
| 12 | 2843088044839778736 |
| 13 | 107962475712487563036 |
| 14 | 4099730989029687616632 |
| 15 | 155681815107415641868980 |
| 16 | 5911809243092764703404608 |