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 | 5 |
| 3 | 16 |
| 4 | 43 |
| 5 | 106 |
| 6 | 249 |
| 7 | 568 |
| 8 | 1271 |
| 9 | 2806 |
| 10 | 6133 |
| 11 | 13300 |
| 12 | 28659 |
| 13 | 61426 |
| 14 | 131057 |
| 15 | 278512 |
| 16 | 589807 |
| 17 | 1245166 |
| 18 | 2621421 |
| 19 | 5505004 |
| 20 | 11534315 |
| 21 | 24117226 |
| 22 | 50331625 |
| 23 | 104857576 |
| 24 | 218103783 |
| 25 | 452984806 |
| 26 | 939524069 |
| 27 | 1946157028 |
| 28 | 4026531811 |
| 29 | 8321499106 |