n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 23 |
5 | 103 |
6 | 535 |
7 | 3153 |
8 | 20676 |
9 | 149148 |
10 | 1172343 |
11 | 9960085 |
12 | 90864801 |
13 | 885278605 |
14 | 9167936406 |
15 | 100508961982 |
16 | 1162366436355 |
17 | 14136151459043 |
18 | 180287711599455 |
19 | 2405321659729837 |
20 | 33495442060505752 |
21 | 485880832780748932 |
[0,1,2,6,23,103,535,3153,20676,149148,1172343, 9960085,90864801,885278605,9167936406, 100508961982,1162366436355,14136151459043, 180287711599455,2405321659729837, 33495442060505752,485880832780748932] |