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 | 7 |
| 4 | 36 |
| 5 | 166 |
| 6 | 729 |
| 7 | 3125 |
| 8 | 13229 |
| 9 | 55637 |
| 10 | 233227 |
| 11 | 976271 |
| 12 | 4085016 |
| 13 | 17096524 |
| 14 | 71590557 |
| 15 | 299993227 |
| 16 | 1258076725 |
| 17 | 5280194087 |
| 18 | 22178492943 |
| 19 | 93226087229 |
| 20 | 392144055809 |
| 21 | 1650570659359 |
| 22 | 6951524807631 |
| 23 | 29292822272697 |
| 24 | 123496979334851 |