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 | 8 |
| 3 | 27 |
| 4 | 84 |
| 5 | 237 |
| 6 | 644 |
| 7 | 1695 |
| 8 | 4376 |
| 9 | 11129 |
| 10 | 28000 |
| 11 | 69859 |
| 12 | 173180 |
| 13 | 427141 |
| 14 | 1049308 |
| 15 | 2569447 |
| 16 | 6275584 |
| 17 | 15295377 |
| 18 | 37215864 |
| 19 | 90426155 |
| 20 | 219466276 |
| 21 | 532154909 |
| 22 | 1289368500 |
| 23 | 3122076719 |
| 24 | 7555891560 |
| 25 | 18278599081 |
| 26 | 44202568208 |
| 27 | 106862692467 |