n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 7 |
3 | 35 |
4 | 154 |
5 | 637 |
6 | 2548 |
7 | 9996 |
8 | 38759 |
9 | 149205 |
10 | 571781 |
11 | 2184910 |
12 | 8333871 |
13 | 31750824 |
14 | 120875944 |
15 | 459957169 |
16 | 1749692735 |
17 | 6654580387 |
18 | 25306064602 |
19 | 96226175941 |
20 | 365880389868 |
21 | 1391138718116 |
22 | 5289228800247 |
23 | 20109822277181 |
24 | 76457523763621 |
25 | 290689756066542 |
[0,1,7,35,154,637,2548,9996,38759,149205,571781, 2184910,8333871,31750824,120875944,459957169, 1749692735,6654580387,25306064602,96226175941, 365880389868,1391138718116,5289228800247, 20109822277181,76457523763621,290689756066542] |