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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 32 |
| 6 | 128 |
| 7 | 344 |
| 8 | 1072 |
| 9 | 3400 |
| 10 | 9832 |
| 11 | 27600 |
| 12 | 77000 |
| 13 | 211736 |
| 14 | 572560 |
| 15 | 1534512 |
| 16 | 4072664 |
| 17 | 10725424 |
| 18 | 28035128 |
| 19 | 72831272 |
| 20 | 188139616 |
| 21 | 483452824 |
| 22 | 1236865976 |
| 23 | 3150044696 |
| 24 | 7994665480 |
| 25 | 20209319824 |
| 26 | 50942982080 |