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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 4 |
| 5 | 1 |
| 6 | 84 |
| 7 | 36 |
| 8 | 9 |
| 9 | 1 |
| 10 | 4584 |
| 11 | 1056 |
| 12 | 144 |
| 13 | 16 |
| 14 | 1 |
| 15 | 469440 |
| 16 | 73200 |
| 17 | 6000 |
| 18 | 400 |
| 19 | 25 |
| 20 | 1 |
| 21 | 76982940 |
| 22 | 9179640 |
| 23 | 537300 |
| 24 | 22800 |
| 25 | 900 |
| 26 | 36 |
| 27 | 1 |
| 28 | 18391183020 |
| 29 | 1794887640 |
| 30 | 83163780 |
| 31 | 2598960 |
| 32 | 67620 |
| 33 | 1764 |
| 34 | 49 |
| 35 | 1 |
| 36 | 6011375932800 |
| 37 | 500614248960 |
| 38 | 19475406720 |
[1,1,1,4,4,1,84,36,9,1,4584,1056,144,16,1,469440, 73200,6000,400,25,1,76982940,9179640,537300,22800, 900,36,1,18391183020,1794887640,83163780,2598960, 67620,1764,49,1,6011375932800,500614248960, 19475406720] |