| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 4 |
| 4 | 1 |
| 5 | 48 |
| 6 | 117 |
| 7 | 126 |
| 8 | 84 |
| 9 | 36 |
| 10 | 9 |
| 11 | 1 |
| 12 | 40 |
| 13 | 560 |
| 14 | 2736 |
| 15 | 6800 |
| 16 | 10310 |
| 17 | 10560 |
| 18 | 7832 |
| 19 | 4352 |
| 20 | 1820 |
| 21 | 560 |
| 22 | 120 |
| 23 | 16 |
| 24 | 1 |
| 25 | 10 |
| 26 | 200 |
| 27 | 3050 |
| 28 | 31525 |
| 29 | 188700 |
| 30 | 677690 |
| 31 | 1610700 |
| 32 | 2740775 |
| 33 | 3527075 |
| 34 | 3562700 |
| 35 | 2895610 |
| 36 | 1923600 |
| 37 | 1053175 |
| 38 | 475950 |
| 39 | 176600 |
| 40 | 53105 |
| 41 | 12650 |
| 42 | 2300 |
| 43 | 300 |
| 44 | 25 |
| 45 | 1 |
| 46 | 18 |
[1,6,4,1,48,117,126,84,36,9,1,40,560,2736,6800, 10310,10560,7832,4352,1820,560,120,16,1,10,200, 3050,31525,188700,677690,1610700,2740775,3527075, 3562700,2895610,1923600,1053175,475950,176600, 53105,12650,2300,300,25,1,18] |