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 | 4 |
| 3 | 14 |
| 4 | 50 |
| 5 | 179 |
| 6 | 632 |
| 7 | 2192 |
| 8 | 7478 |
| 9 | 25157 |
| 10 | 83660 |
| 11 | 275570 |
| 12 | 900506 |
| 13 | 2922935 |
| 14 | 9433088 |
| 15 | 30292148 |
| 16 | 96855134 |
| 17 | 308501513 |
| 18 | 979312916 |
| 19 | 3099363926 |
| 20 | 9782367362 |
| 21 | 30799928891 |
| 22 | 96758267144 |
| 23 | 303350242904 |
| 24 | 949277053190 |
| 25 | 2965510133069 |
| 26 | 9249567319772 |
| 27 | 28807812721082 |
| 28 | 89600770448618 |