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 | 3 |
| 3 | 25 |
| 4 | 281 |
| 5 | 2941 |
| 6 | 30596 |
| 7 | 315385 |
| 8 | 3231664 |
| 9 | 32972224 |
| 10 | 335346193 |
| 11 | 3402373313 |
| 12 | 34454358909 |
| 13 | 348373701706 |
| 14 | 3518101287286 |
| 15 | 35491654274101 |