n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 3 |
3 | 6 |
4 | 19 |
5 | 48 |
6 | 141 |
7 | 378 |
8 | 1063 |
9 | 2920 |
10 | 8115 |
11 | 22418 |
12 | 62123 |
13 | 171876 |
14 | 475919 |
15 | 1317250 |
16 | 3646681 |
17 | 10094356 |
18 | 27943739 |
19 | 77353070 |
20 | 214129845 |
21 | 592752572 |
22 | 1640859689 |
23 | 4542223926 |
24 | 12573787053 |
25 | 34806745800 |
26 | 96352029241 |
27 | 266721635838 |
28 | 738338745535 |
29 | 2043868995512 |
[1,0,3,6,19,48,141,378,1063,2920,8115,22418,62123, 171876,475919,1317250,3646681,10094356,27943739, 77353070,214129845,592752572,1640859689, 4542223926,12573787053,34806745800,96352029241, 266721635838,738338745535,2043868995512] |