n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 7 |
4 | 32 |
5 | 168 |
6 | 970 |
7 | 5984 |
8 | 38786 |
9 | 261160 |
10 | 1812630 |
11 | 12895360 |
12 | 93638634 |
13 | 691793872 |
14 | 5186869122 |
15 | 39388514522 |
16 | 302457399674 |
17 | 2345362579172 |
18 | 18345337742960 |
19 | 144612959167806 |
20 | 1147920496989270 |
21 | 9169516892088470 |
[1,2,7,32,168,970,5984,38786,261160,1812630, 12895360,93638634,691793872,5186869122, 39388514522,302457399674,2345362579172, 18345337742960,144612959167806,1147920496989270, 9169516892088470] |