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 | 47 |
| 3 | 318 |
| 4 | 10546 |
| 5 | 10552 |
| 6 | 10629 |
| 7 | 86544 |
| 8 | 56196114 |
| 9 | 56200915 |
| 10 | 56676030 |
| 11 | 4555804158 |
| 12 | 4559732893 |
| 13 | 77220966866 |
| 14 | 2907021742443997 |
| 15 | 2907021767925176 |
| 16 | 2907024290266584 |
| 17 | 2932496986613869 |
| 18 | 51280189662853652 |
| 19 | 2461813897281353935 |
| 20 | 23422580231698333926 |
| 21 | 23422580438055032295 |