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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | 4 |
| 7 | 6 |
| 8 | 14 |
| 9 | 18 |
| 10 | 36 |
| 11 | 50 |
| 12 | 94 |
| 13 | 130 |
| 14 | 236 |
| 15 | 330 |
| 16 | 580 |
| 17 | 816 |
| 18 | 1404 |
| 19 | 1984 |
| 20 | 3354 |
| 21 | 4758 |
| 22 | 7932 |
| 23 | 11286 |
| 24 | 18600 |
| 25 | 26532 |
| 26 | 43308 |
| 27 | 61908 |
| 28 | 100232 |
| 29 | 143540 |
| 30 | 230776 |
| 31 | 331008 |
| 32 | 528950 |
| 33 | 759726 |
| 34 | 1207584 |
| 35 | 1736534 |
| 36 | 2747242 |
| 37 | 3954826 |
| 38 | 6230444 |
| 39 | 8977686 |
| 40 | 14090410 |
| 41 | 20320854 |