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 | 1 |
| 6 | 63 |
| 7 | 2667 |
| 8 | 97155 |
| 9 | 3309747 |
| 10 | 109221651 |
| 11 | 3548836819 |
| 12 | 114429029715 |
| 13 | 3675639930963 |
| 14 | 117843461817939 |
| 15 | 3774561792168531 |
| 16 | 120843139740969555 |
| 17 | 3867895279362300499 |
| 18 | 123787287537281350227 |
| 19 | 3961427432158861458003 |
| 20 | 126769425631762997934675 |
| 21 | 4056681585917103881615955 |
| 22 | 129814770207420913565727315 |