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 | 3 |
| 2 | 26 |
| 3 | 264 |
| 4 | 3114 |
| 5 | 25824 |
| 6 | 260167 |
| 7 | 2639867 |
| 8 | 25845676 |
| 9 | 260147437 |
| 10 | 2582245083 |
| 11 | 25843178924 |
| 12 | 258241744863 |
| 13 | 2582010592114 |
| 14 | 25825761924437 |
| 15 | 258218875510676 |
| 16 | 2581990857627114 |
| 17 | 25820083014911063 |
| 18 | 258199298347206526 |
| 19 | 2581988959445543367 |
| 20 | 25819892911624938937 |
| 21 | 258198891881411585714 |