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) |
|---|---|
| 6 | 6 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 132 |
| 13 | 312 |
| 14 | 364 |
| 15 | 420 |
| 16 | 480 |
| 17 | 544 |
| 18 | 5814 |
| 19 | 19152 |
| 20 | 44080 |
| 21 | 76440 |
| 22 | 117348 |
| 23 | 167992 |
| 24 | 521640 |
| 25 | 1686000 |
| 26 | 4453800 |
| 27 | 9985248 |
| 28 | 19352088 |
| 29 | 33855528 |
| 30 | 76272030 |
| 31 | 210339960 |
| 32 | 568514208 |
| 33 | 1389968448 |
| 34 | 3071086788 |
| 35 | 6184192000 |
| 36 | 13415398920 |
| 37 | 33589083960 |
| 38 | 88858312814 |