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 | 4 |
| 2 | 101 |
| 3 | 12782 |
| 4 | 8584767 |
| 5 | 20104116089 |
| 6 | 122644465172798 |
| 7 | 1658339657066189475 |
| 8 | 44564623565972592394826 |
| 9 | 2193250056291167380214634054 |
| 10 | 185389574171283940222059091478222 |