n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 11 |
5 | 44 |
6 | 189 |
7 | 850 |
8 | 3951 |
9 | 18832 |
10 | 91542 |
11 | 452075 |
12 | 2261753 |
13 | 11439372 |
14 | 58394014 |
15 | 300455892 |
16 | 1556636807 |
17 | 8113709916 |
18 | 42518000652 |
19 | 223868503324 |
20 | 1183764310960 |
21 | 6283573101960 |
22 | 33470346433605 |
23 | 178850415320010 |
[0,1,1,3,11,44,189,850,3951,18832,91542,452075, 2261753,11439372,58394014,300455892,1556636807, 8113709916,42518000652,223868503324,1183764310960, 6283573101960,33470346433605,178850415320010] |