n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 2 |
5 | 10 |
6 | 60 |
7 | 420 |
8 | 140 |
9 | 1260 |
10 | 105 |
11 | 1155 |
12 | 13860 |
13 | 180180 |
14 | 2522520 |
15 | 37837800 |
16 | 840840 |
17 | 14294280 |
18 | 51051 |
19 | 969969 |
20 | 19399380 |
21 | 407386980 |
22 | 8962513560 |
23 | 206137811880 |
24 | 4947307485120 |
25 | 123682687128000 |
26 | 79755701025 |
27 | 2153403927675 |
28 | 60295309974900 |
29 | 1748563989272100 |
30 | 52456919678163000 |
[1,1,3,2,10,60,420,140,1260,105,1155,13860,180180, 2522520,37837800,840840,14294280,51051,969969, 19399380,407386980,8962513560,206137811880, 4947307485120,123682687128000,79755701025, 2153403927675,60295309974900,1748563989272100, 52456919678163000] |