n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 7 |
3 | 48 |
4 | 329 |
5 | 2255 |
6 | 15456 |
7 | 105937 |
8 | 726103 |
9 | 4976784 |
10 | 34111385 |
11 | 233802911 |
12 | 1602508992 |
13 | 10983760033 |
14 | 75283811239 |
15 | 516002918640 |
16 | 3536736619241 |
17 | 24241153416047 |
18 | 166151337293088 |
19 | 1138818207635569 |
20 | 7805576116155895 |
21 | 53500214605455696 |
22 | 366695926122033977 |
[0,1,7,48,329,2255,15456,105937,726103,4976784, 34111385,233802911,1602508992,10983760033, 75283811239,516002918640,3536736619241, 24241153416047,166151337293088,1138818207635569, 7805576116155895,53500214605455696, 366695926122033977] |