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 | 39 |
| 3 | 241 |
| 4 | 34883 |
| 5 | 14039 |
| 6 | 1516871 |
| 7 | 7601151 |
| 8 | 875425657 |
| 9 | 7887002813 |
| 10 | 7095769757767 |
| 11 | 14199583385459 |
| 12 | 75087685321529 |
| 13 | 75113436870869 |
| 14 | 927229349730873529 |
| 15 | 927436191807263569 |
| 16 | 305182576081725442901 |
| 17 | 23479178371879154033 |
| 18 | 37713848011377144613 |
| 19 | 37717984058802320713 |
| 20 | 135759786815564675620247 |