n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 27 |
6 | 160 |
7 | 1189 |
8 | 10600 |
9 | 110161 |
10 | 1306629 |
11 | 17408293 |
12 | 257299241 |
13 | 4177017722 |
14 | 73872560359 |
15 | 1413560616317 |
16 | 29096001945172 |
17 | 641010535303531 |
18 | 15049350893772391 |
19 | 375084409475304164 |
20 | 9890697492431533299 |
[1,1,1,2,6,27,160,1189,10600,110161,1306629, 17408293,257299241,4177017722,73872560359, 1413560616317,29096001945172,641010535303531, 15049350893772391,375084409475304164, 9890697492431533299] |