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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 1 |
| 4 | 6 |
| 5 | 8 |
| 6 | 2 |
| 7 | 24 |
| 8 | 58 |
| 9 | 37 |
| 10 | 6 |
| 11 | 120 |
| 12 | 444 |
| 13 | 504 |
| 14 | 204 |
| 15 | 24 |
| 16 | 720 |
| 17 | 3708 |
| 18 | 6388 |
| 19 | 4553 |
| 20 | 1318 |
| 21 | 120 |
| 22 | 5040 |
| 23 | 33984 |
| 24 | 81136 |
| 25 | 87296 |
| 26 | 44176 |
| 27 | 9792 |
| 28 | 720 |
| 29 | 40320 |
| 30 | 341136 |
| 31 | 1064124 |
| 32 | 1582236 |
| 33 | 1203921 |
| 34 | 463860 |
| 35 | 82332 |
| 36 | 5040 |
| 37 | 362880 |
| 38 | 3733920 |
| 39 | 14602320 |
| 40 | 28328480 |
| 41 | 29724000 |
| 42 | 17164320 |
| 43 | 5270480 |
| 44 | 773280 |
| 45 | 40320 |
| 46 | 3628800 |
| 47 | 44339040 |
| 48 | 210852936 |
| 49 | 512539012 |
| 50 | 700870638 |
| 51 | 557061609 |
| 52 | 255644668 |
| 53 | 64621692 |
| 54 | 8026416 |
| 55 | 362880 |
[1,1,2,1,6,8,2,24,58,37,6,120,444,504,204,24,720, 3708,6388,4553,1318,120,5040,33984,81136,87296, 44176,9792,720,40320,341136,1064124,1582236, 1203921,463860,82332,5040,362880,3733920,14602320, 28328480,29724000,17164320,5270480,773280,40320, 3628800,44339040,210852936,512539012,700870638, 557061609,255644668,64621692,8026416,362880] |