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 | 0 |
| 1 | 1 |
| 2 | 34 |
| 3 | 369 |
| 4 | 2056 |
| 5 | 7825 |
| 6 | 23346 |
| 7 | 58849 |
| 8 | 131104 |
| 9 | 265761 |
| 10 | 500050 |
| 11 | 885841 |
| 12 | 1493064 |
| 13 | 2413489 |
| 14 | 3764866 |
| 15 | 5695425 |
| 16 | 8388736 |
| 17 | 12068929 |
| 18 | 17006274 |
| 19 | 23523121 |
| 20 | 32000200 |
| 21 | 42883281 |
| 22 | 56690194 |
| 23 | 74018209 |
| 24 | 95551776 |
| 25 | 122070625 |
| 26 | 154458226 |
| 27 | 193710609 |