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) |
|---|---|
| 2 | 1 |
| 3 | 73 |
| 4 | 5986 |
| 5 | 484210 |
| 6 | 39226915 |
| 7 | 3177326971 |
| 8 | 257363962948 |
| 9 | 20846476694116 |
| 10 | 1688564650965445 |
| 11 | 136773736379522605 |
| 12 | 11078672649879436966 |
| 13 | 897372484611991440598 |
| 14 | 72687171253825493271271 |
| 15 | 5887660871557577275727455 |
| 16 | 476900530596184348447133320 |