n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 3 |
5 | 13 |
6 | 42 |
7 | 146 |
8 | 476 |
9 | 1574 |
10 | 5122 |
11 | 16706 |
12 | 54256 |
13 | 176254 |
14 | 571954 |
15 | 1856245 |
16 | 6023681 |
17 | 19551939 |
18 | 63476314 |
19 | 206145075 |
20 | 669695819 |
21 | 2176401235 |
22 | 7075521724 |
23 | 23011145314 |
24 | 74864599954 |
25 | 243652588070 |
26 | 793264765396 |
27 | 2583532274289 |
28 | 8416929889967 |
29 | 27430452311513 |
[0,0,0,1,3,13,42,146,476,1574,5122,16706,54256, 176254,571954,1856245,6023681,19551939,63476314, 206145075,669695819,2176401235,7075521724, 23011145314,74864599954,243652588070,793264765396, 2583532274289,8416929889967,27430452311513] |