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 | 0 |
| 2 | 8 |
| 3 | 8000 |
| 4 | 3869893 |
| 5 | 8000000 |
| 6 | 3869893000 |
| 7 | 3996969003 |
| 8 | 8000000000 |
| 9 | 99060039883 |
| 10 | 339630096833 |
| 11 | 630966396033 |
| 12 | 688933306368 |
| 13 | 869889903336 |
| 14 | 3869893000000 |
| 15 | 3996969003000 |
| 16 | 8000000000000 |
| 17 | 63836938680696 |
| 18 | 99060039883000 |
| 19 | 339630096833000 |
| 20 | 630966396033000 |
| 21 | 688933306368000 |