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 | 1 |
| 1 | 3 |
| 2 | 3 |
| 3 | 12 |
| 4 | 38 |
| 5 | 167 |
| 6 | 731 |
| 7 | 3504 |
| 8 | 16734 |
| 9 | 81247 |
| 10 | 392387 |
| 11 | 1886246 |
| 12 | 8958474 |
| 13 | 41841440 |
| 14 | 190731843 |
| 15 | 841422704 |
| 16 | 3558291221 |
| 17 | 14287757043 |