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) |
|---|---|
| 5 | 11 |
| 6 | 1105 |
| 7 | 58275 |
| 8 | 2356234 |
| 9 | 84487110 |
| 10 | 2884205268 |
| 11 | 97429005146 |
| 12 | 3329662705550 |
| 13 | 116630388753489 |
| 14 | 4219224762555705 |
| 15 | 158324528197417845 |
| 16 | 6176733251642200764 |
| 17 | 250790095398521046060 |
| 18 | 10599852184347703429872 |
| 19 | 466235894350970551104804 |
| 20 | 21329051731506881800764804 |