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 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 4 |
| 6 | 2 |
| 7 | 10 |
| 8 | 6 |
| 9 | 28 |
| 10 | 16 |
| 11 | 76 |
| 12 | 44 |
| 13 | 208 |
| 14 | 120 |
| 15 | 568 |
| 16 | 328 |
| 17 | 1552 |
| 18 | 896 |
| 19 | 4240 |
| 20 | 2448 |
| 21 | 11584 |
| 22 | 6688 |
| 23 | 31648 |
| 24 | 18272 |
| 25 | 86464 |
| 26 | 49920 |
| 27 | 236224 |
| 28 | 136384 |
| 29 | 645376 |
| 30 | 372608 |
| 31 | 1763200 |
| 32 | 1017984 |
| 33 | 4817152 |
| 34 | 2781184 |
| 35 | 13160704 |
| 36 | 7598336 |
| 37 | 35955712 |
| 38 | 20759040 |
| 39 | 98232832 |