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 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 5 |
| 8 | 7 |
| 9 | 14 |
| 10 | 26 |
| 11 | 43 |
| 12 | 79 |
| 13 | 148 |
| 14 | 264 |
| 15 | 483 |
| 16 | 903 |
| 17 | 1664 |
| 18 | 3080 |
| 19 | 5771 |
| 20 | 10795 |
| 21 | 20209 |
| 22 | 38059 |
| 23 | 71799 |
| 24 | 135569 |
| 25 | 256762 |
| 26 | 487310 |
| 27 | 925981 |
| 28 | 1762841 |
| 29 | 3361897 |
| 30 | 6419595 |
| 31 | 12275301 |
| 32 | 23505143 |
| 33 | 45061424 |
| 34 | 86485016 |
| 35 | 166176499 |
| 36 | 319630115 |
| 37 | 615387675 |
| 38 | 1185940209 |
| 39 | 2287527119 |
| 40 | 4416083429 |