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 | 1 |
| 4 | 3 |
| 5 | 9 |
| 6 | 18 |
| 7 | 38 |
| 8 | 68 |
| 9 | 120 |
| 10 | 200 |
| 11 | 326 |
| 12 | 508 |
| 13 | 785 |
| 14 | 1179 |
| 15 | 1741 |
| 16 | 2532 |
| 17 | 3633 |
| 18 | 5141 |
| 19 | 7199 |
| 20 | 9972 |
| 21 | 13680 |
| 22 | 18618 |
| 23 | 25116 |
| 24 | 33642 |
| 25 | 44738 |
| 26 | 59139 |
| 27 | 77653 |
| 28 | 101444 |
| 29 | 131751 |
| 30 | 170320 |
| 31 | 219049 |
| 32 | 280553 |
| 33 | 357652 |
| 34 | 454254 |
| 35 | 574507 |
| 36 | 724135 |
| 37 | 909265 |
| 38 | 1138169 |
| 39 | 1419737 |
| 40 | 1765884 |
| 41 | 2189441 |