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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 7 |
| 7 | 14 |
| 8 | 31 |
| 9 | 67 |
| 10 | 148 |
| 11 | 325 |
| 12 | 717 |
| 13 | 1580 |
| 14 | 3485 |
| 15 | 7685 |
| 16 | 16950 |
| 17 | 37383 |
| 18 | 82451 |
| 19 | 181850 |
| 20 | 401083 |
| 21 | 884615 |
| 22 | 1951080 |
| 23 | 4303241 |
| 24 | 9491097 |
| 25 | 20933272 |
| 26 | 46169785 |
| 27 | 101830665 |
| 28 | 224594602 |
| 29 | 495358987 |
| 30 | 1092548639 |
| 31 | 2409691878 |
| 32 | 5314742743 |