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 | 0 |
| 4 | 364 |
| 5 | 0 |
| 6 | 0 |
| 7 | 8192 |
| 8 | 16044 |
| 9 | 0 |
| 10 | 0 |
| 11 | 114688 |
| 12 | 200928 |
| 13 | 0 |
| 14 | 0 |
| 15 | 745472 |
| 16 | 1089452 |
| 17 | 0 |
| 18 | 0 |
| 19 | 3096576 |
| 20 | 4196920 |
| 21 | 0 |
| 22 | 0 |
| 23 | 9691136 |
| 24 | 12547808 |
| 25 | 0 |
| 26 | 0 |
| 27 | 25346048 |
| 28 | 31553344 |
| 29 | 0 |
| 30 | 0 |
| 31 | 58261504 |
| 32 | 70439852 |
| 33 | 0 |
| 34 | 0 |
| 35 | 120553472 |
| 36 | 142487436 |