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 | 0 |
| 2 | 5 |
| 3 | 38 |
| 4 | 303 |
| 5 | 2390 |
| 6 | 19593 |
| 7 | 166032 |
| 8 | 1440186 |
| 9 | 12711333 |
| 10 | 113761326 |
| 11 | 1029509896 |
| 12 | 9401974132 |
| 13 | 86516371101 |