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 | 5 |
| 3 | 28 |
| 4 | 97 |
| 5 | 1025 |
| 6 | 4160 |
| 7 | 18571 |
| 8 | 390626 |
| 9 | 1953637 |
| 10 | 9824674 |
| 11 | 53022429 |
| 12 | 2176782337 |
| 13 | 13060702208 |
| 14 | 78368947065 |
| 15 | 471258726400 |
| 16 | 2973697798081 |
| 17 | 232630513987208 |
| 18 | 1628413598172593 |
| 19 | 11398896347634610 |
| 20 | 79793365809239777 |
| 21 | 559022701241487132 |
| 22 | 4041442752425255185 |