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 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 3 |
| 6 | 2 |
| 7 | 5 |
| 8 | 12 |
| 9 | 22 |
| 10 | 26 |
| 11 | 58 |
| 12 | 100 |
| 13 | 203 |
| 14 | 282 |
| 15 | 616 |
| 16 | 962 |
| 17 | 2045 |
| 18 | 2982 |
| 19 | 6518 |
| 20 | 9858 |
| 21 | 21416 |
| 22 | 31680 |
| 23 | 69623 |
| 24 | 104158 |
| 25 | 228930 |
| 26 | 339978 |
| 27 | 751430 |
| 28 | 1119668 |
| 29 | 2478787 |
| 30 | 3684082 |
| 31 | 8182469 |
| 32 | 12171900 |
| 33 | 27082870 |
| 34 | 40247978 |
| 35 | 89748642 |
| 36 | 133394708 |
| 37 | 297933185 |
| 38 | 442628598 |
| 39 | 990210110 |