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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 6 |
| 4 | 1 |
| 5 | 1 |
| 6 | 90 |
| 7 | 20 |
| 8 | 2 |
| 9 | 1 |
| 10 | 2520 |
| 11 | 1680 |
| 12 | 280 |
| 13 | 6 |
| 14 | 1 |
| 15 | 113400 |
| 16 | 369600 |
| 17 | 277200 |
| 18 | 9072 |
| 19 | 24 |
| 20 | 1 |
| 21 | 7484400 |
| 22 | 168168000 |
| 23 | 1009008000 |
| 24 | 163459296 |
| 25 | 532224 |
| 26 | 120 |
| 27 | 1 |
| 28 | 681080400 |
| 29 | 137225088000 |
| 30 | 9777287520000 |
| 31 | 15205637551104 |
| 32 | 237124952064 |
| 33 | 49420800 |
| 34 | 720 |
| 35 | 1 |
| 36 | 81729648000 |
| 37 | 182509367040000 |
| 38 | 207786914375040000 |
| 39 | 4847253138540933120 |
| 40 | 765985681152147456 |
| 41 | 689598074880000 |
| 42 | 6671808000 |
| 43 | 5040 |
| 44 | 1 |
[1,1,1,6,1,1,90,20,2,1,2520,1680,280,6,1,113400, 369600,277200,9072,24,1,7484400,168168000, 1009008000,163459296,532224,120,1,681080400, 137225088000,9777287520000,15205637551104, 237124952064,49420800,720,1,81729648000, 182509367040000,207786914375040000, 4847253138540933120,765985681152147456, 689598074880000,6671808000,5040,1] |