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 | 1 |
| 2 | 3 |
| 3 | 14 |
| 4 | 74 |
| 5 | 425 |
| 6 | 2515 |
| 7 | 15209 |
| 8 | 93382 |
| 9 | 579950 |
| 10 | 3634062 |
| 11 | 22935259 |
| 12 | 145601216 |
| 13 | 928875440 |
| 14 | 5950570725 |
| 15 | 38257352346 |
| 16 | 246730727752 |
| 17 | 1595578916923 |