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 | 4 |
| 2 | 6 |
| 3 | 13 |
| 4 | 18 |
| 5 | 48 |
| 6 | 84 |
| 7 | 176 |
| 8 | 258 |
| 9 | 800 |
| 10 | 1302 |
| 11 | 2736 |
| 12 | 4356 |
| 13 | 10928 |
| 14 | 20520 |
| 15 | 51792 |
| 16 | 65538 |
| 17 | 174768 |
| 18 | 351120 |
| 19 | 699056 |
| 20 | 1110276 |
| 21 | 3100240 |
| 22 | 5048232 |
| 23 | 11184816 |
| 24 | 17041416 |
| 25 | 49012992 |
| 26 | 82623888 |
| 27 | 211053040 |
| 28 | 284225796 |
| 29 | 727960800 |
| 30 | 1494039792 |
| 31 | 2863311536 |
| 32 | 4301668356 |
| 33 | 12611914848 |
| 34 | 20788904016 |