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 | 4 |
| 1 | 27 |
| 2 | 104 |
| 3 | 305 |
| 4 | 756 |
| 5 | 1667 |
| 6 | 3368 |
| 7 | 6354 |
| 8 | 11340 |
| 9 | 19327 |
| 10 | 31680 |
| 11 | 50219 |
| 12 | 77324 |
| 13 | 116055 |
| 14 | 170288 |
| 15 | 244868 |
| 16 | 345780 |
| 17 | 480339 |
| 18 | 657400 |
| 19 | 887589 |
| 20 | 1183556 |
| 21 | 1560251 |
| 22 | 2035224 |
| 23 | 2628950 |
| 24 | 3365180 |
| 25 | 4271319 |
| 26 | 5378832 |