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 | 58 |
| 4 | 601 |
| 5 | 7656 |
| 6 | 116929 |
| 7 | 2092112 |
| 8 | 43006401 |
| 9 | 999637120 |
| 10 | 25933795801 |
| 11 | 742968453888 |
| 12 | 23297606120881 |
| 13 | 793708546233344 |
| 14 | 29192838847099425 |
| 15 | 1152920196932478976 |
| 16 | 48661170952876980481 |
| 17 | 2185911204051268435968 |
| 18 | 104127343895537535804841 |
| 19 | 5242879878354899591168000 |