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 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 16 |
| 5 | 39 |
| 6 | 152 |
| 7 | 517 |
| 8 | 2056 |
| 9 | 8002 |
| 10 | 32692 |
| 11 | 134198 |
| 12 | 561511 |
| 13 | 2366909 |
| 14 | 10075926 |
| 15 | 43174057 |
| 16 | 186208658 |
| 17 | 807426463 |
| 18 | 3518610508 |
| 19 | 15400996653 |