n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 12 |
4 | 30 |
5 | 30 |
6 | 105 |
7 | 840 |
8 | 252 |
9 | 1260 |
10 | 6930 |
11 | 1980 |
12 | 12870 |
13 | 2574 |
14 | 2145 |
15 | 34320 |
16 | 291720 |
17 | 79560 |
18 | 151164 |
19 | 1511640 |
20 | 406980 |
21 | 4476780 |
22 | 51482970 |
23 | 13728792 |
24 | 171609900 |
25 | 318704100 |
26 | 84362850 |
27 | 1181079900 |
28 | 311375610 |
29 | 81940950 |
30 | 1270084725 |
31 | 40642711200 |
32 | 10644519600 |
[1,2,3,12,30,30,105,840,252,1260,6930,1980,12870, 2574,2145,34320,291720,79560,151164,1511640, 406980,4476780,51482970,13728792,171609900, 318704100,84362850,1181079900,311375610,81940950, 1270084725,40642711200,10644519600] |