n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 10 |
4 | 47 |
5 | 201 |
6 | 849 |
7 | 3578 |
8 | 15147 |
9 | 64516 |
10 | 276268 |
11 | 1188342 |
12 | 5130987 |
13 | 22226036 |
14 | 96543989 |
15 | 420368843 |
16 | 1834203939 |
17 | 8018057328 |
18 | 35107961157 |
19 | 153950675566 |
20 | 675978772306 |
21 | 2971700764920 |
22 | 13078268135661 |
23 | 57613905606250 |
24 | 254038914924767 |
25 | 1121081799217206 |
26 | 4951199308679965 |
[1,0,1,10,47,201,849,3578,15147,64516,276268, 1188342,5130987,22226036,96543989,420368843, 1834203939,8018057328,35107961157,153950675566, 675978772306,2971700764920,13078268135661, 57613905606250,254038914924767,1121081799217206, 4951199308679965] |