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) |
|---|---|
| 0 | 3 |
| 1 | 3 |
| 2 | 14 |
| 3 | 99 |
| 4 | 858 |
| 5 | 8398 |
| 6 | 89148 |
| 7 | 1002915 |
| 8 | 11785890 |
| 9 | 143291610 |
| 10 | 1790214660 |
| 11 | 22870640910 |
| 12 | 297670187844 |
| 13 | 3935861372604 |
| 14 | 52749590350072 |
| 15 | 715309969142307 |
| 16 | 9800129095949682 |
| 17 | 135490673691621794 |
| 18 | 1888389218820071604 |
| 19 | 26510079418051005210 |
| 20 | 374589577468070301260 |
| 21 | 5324240442532424176260 |
| 22 | 76082624294738699098440 |