n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 7 |
3 | 52 |
4 | 385 |
5 | 2851 |
6 | 21112 |
7 | 156337 |
8 | 1157695 |
9 | 8572876 |
10 | 63483217 |
11 | 470101147 |
12 | 3481157680 |
13 | 25778407201 |
14 | 190892323447 |
15 | 1413581485732 |
16 | 10467747370465 |
17 | 77514976050451 |
18 | 574008074464552 |
19 | 4250601449403217 |
20 | 31476234369216175 |
[0,1,7,52,385,2851,21112,156337,1157695,8572876, 63483217,470101147,3481157680,25778407201, 190892323447,1413581485732,10467747370465, 77514976050451,574008074464552,4250601449403217, 31476234369216175] |